:root{
    --brand: rgb(213, 5, 5);
    --brand-deep: rgb(180, 4, 4);
    --brand-dark: rgb(150, 3, 3);
    --text: #222;
    --muted: #666;
    --light: #f6f7f9;
    --line: #e8e8e8;
    --card: #fff;
    --shadow: 0 12px 30px rgba(20,20,20,.08);
    --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:1.75;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1160px, calc(100% - 32px));margin:0 auto}
.site-header{position:relative;z-index:20;background:#fff;box-shadow:0 2px 14px rgba(0,0,0,.05)}
.mobile-header{height:64px;display:grid;grid-template-columns:52px 1fr 76px;align-items:center;background:#fff;border-bottom:3px solid var(--brand-deep);padding:0 12px}
.menu-toggle{width:42px;height:42px;border:0;background:#fff;display:flex;flex-direction:column;gap:5px;align-items:center;justify-content:center;border-radius:12px;cursor:pointer}
.menu-toggle span{width:23px;height:2px;background:var(--brand-deep);border-radius:4px;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{height:34px;width:auto;object-fit:contain}
.top-action{display:inline-flex;align-items:center;justify-content:center;min-height:38px;padding:0 16px;border-radius:999px;background:var(--brand);color:#fff;font-weight:700;box-shadow:0 8px 18px rgba(213,5,5,.22);white-space:nowrap}
.top-action:hover,.main-btn:hover{background:var(--brand-dark)}
.mobile-nav{display:none;background:#fff;border-bottom:1px solid var(--line);padding:8px 16px 14px;grid-template-columns:1fr 1fr;gap:8px}
.mobile-nav.open{display:grid}
.mobile-nav a{padding:10px 12px;border-radius:12px;background:#fafafa;border:1px solid var(--line);font-size:14px;color:#333;text-align:center}
.mobile-nav a.active{color:#fff;background:var(--brand);border-color:var(--brand)}
.desktop-header{display:none}
.header-topbar{background:var(--brand-deep);color:#fff;font-size:13px}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px;opacity:.96}
.desktop-mainbar{background:#fff;border-bottom:1px solid var(--line)}
.desktop-nav-wrap{height:78px;display:flex;align-items:center;gap:28px}
.desktop-logo img{height:46px;width:auto;object-fit:contain}
.desktop-nav{display:flex;align-items:center;gap:4px;flex:1;justify-content:center}
.desktop-nav a{padding:12px 13px;border-radius:12px;color:#333;font-weight:650;font-size:15px;white-space:nowrap}
.desktop-nav a:hover,.desktop-nav a.active{color:var(--brand);background:rgba(213,5,5,.08)}
.header-tools{display:flex;align-items:center;gap:12px}
.search-icon{width:38px;height:38px;border-radius:50%;border:1px solid var(--line);position:relative;display:inline-block;background:#fff}
.search-icon:before{content:"";position:absolute;left:11px;top:10px;width:12px;height:12px;border:2px solid var(--brand);border-radius:50%}
.search-icon:after{content:"";position:absolute;left:23px;top:24px;width:9px;height:2px;background:var(--brand);transform:rotate(45deg);border-radius:2px}
main{background:#fff}
.section{padding:56px 0}
.section-light{background:var(--light)}
.section-title{margin:0 0 10px;font-size:28px;line-height:1.25;color:#111;letter-spacing:-.02em}
.section-lead{margin:0 0 26px;color:var(--muted);max-width:760px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 24px;border-radius:999px;background:var(--brand);color:#fff;font-weight:800;box-shadow:0 10px 24px rgba(213,5,5,.22);border:0}
.ghost-link{display:inline-flex;align-items:center;color:var(--brand);font-weight:700;margin-top:12px}
.ghost-link:after{content:"›";font-size:22px;margin-left:6px;line-height:1}
.official-hero{background:linear-gradient(180deg,#fff 0%,#f8f8f8 100%);padding:42px 0 30px;border-bottom:1px solid var(--line)}
.hero-grid{display:grid;gap:28px;align-items:center}
.hero-labels{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:14px}
.hero-labels span,.red-tag{display:inline-flex;align-items:center;border-radius:999px;background:rgba(213,5,5,.08);color:var(--brand);font-weight:700;font-size:13px;padding:6px 12px}
.hero-title{font-size:34px;line-height:1.18;margin:0 0 16px;color:#111;letter-spacing:-.03em}
.hero-text{font-size:16px;color:#555;margin:0 0 22px;max-width:620px}
.hero-note{margin-top:18px;display:grid;gap:8px;color:#555;font-size:14px}
.hero-note span{padding-left:14px;position:relative}
.hero-note span:before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.hero-visual{position:relative;border-radius:24px;overflow:hidden;background:#fff;box-shadow:var(--shadow);border:1px solid var(--line)}
.hero-visual img{width:100%;height:310px;object-fit:cover}
.hero-visual .visual-card{position:absolute;left:18px;right:18px;bottom:18px;background:rgba(255,255,255,.92);backdrop-filter:blur(6px);border-radius:18px;padding:14px;border:1px solid rgba(255,255,255,.7)}
.visual-card strong{display:block;color:#111}.visual-card p{margin:4px 0 0;color:#555;font-size:14px}
.brand-ribbon{display:grid;grid-template-columns:1fr;gap:12px;margin-top:24px}
.brand-ribbon span{background:#fff;border:1px solid var(--line);border-radius:16px;padding:12px 14px;color:#444;font-size:14px;box-shadow:0 8px 24px rgba(0,0,0,.04)}
.category-main-grid{display:grid;gap:16px;margin-top:22px}
.category-sub-grid{display:grid;gap:14px;margin-top:16px}
.category-main-card,.category-sub-card,.focus-card,.info-panel,.mini-card,.data-card,.help-card,.faq-item,.content-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 8px 24px rgba(0,0,0,.05)}
.category-main-card{padding:24px;min-height:220px;position:relative;overflow:hidden}
.category-main-card:before{content:"";position:absolute;right:-32px;top:-42px;width:120px;height:120px;background:rgba(213,5,5,.08);border-radius:50%}
.category-main-card h3,.category-sub-card h3,.focus-card h3,.mini-card h3,.data-card h3,.help-card h3,.content-card h3{margin:0 0 10px;font-size:20px;color:#111}
.category-main-card p,.category-sub-card p,.focus-card p,.mini-card p,.data-card p,.help-card p,.content-card p{margin:0;color:#5b5b5b}
.category-sub-card{padding:18px;min-height:170px}
.focus-grid{display:grid;gap:16px;margin-top:20px}
.focus-card{padding:22px;position:relative}
.focus-card .badge{display:inline-flex;margin-bottom:12px;background:var(--brand);color:#fff;border-radius:999px;padding:5px 11px;font-size:12px;font-weight:700}
.info-split{display:grid;gap:20px;align-items:start}
.info-panel{padding:24px}
.info-list{display:grid;gap:14px;margin-top:18px}
.info-list article{padding:15px;border-radius:14px;background:#fafafa;border:1px solid var(--line)}
.info-list h3{margin:0 0 6px;font-size:17px}.info-list p{margin:0;color:#5d5d5d;font-size:15px}
.info-visual{margin-top:20px;border-radius:18px;overflow:hidden;border:1px solid var(--line)}
.info-visual img{width:100%;height:220px;object-fit:cover}
.showcase{display:grid;gap:24px;align-items:center}
.showcase-image{border-radius:24px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.showcase-image img{width:100%;height:280px;object-fit:cover}
.check-list{display:grid;gap:9px;margin:18px 0 0;padding:0;list-style:none}
.check-list li{padding-left:24px;position:relative;color:#444}.check-list li:before{content:"";position:absolute;left:0;top:10px;width:9px;height:9px;border-radius:50%;background:var(--brand)}
.score-layout{display:grid;gap:20px;align-items:center}
.score-card-box{background:#fff;border:1px solid var(--line);border-radius:24px;padding:20px;box-shadow:var(--shadow)}
.score-card-box img{width:100%;height:200px;object-fit:cover;border-radius:18px;margin-bottom:14px}
.data-card-grid{display:grid;gap:12px}
.data-card{padding:17px;border-left:4px solid var(--brand)}
.app-showcase{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px;display:grid;gap:24px;align-items:center;box-shadow:var(--shadow)}
.app-showcase img{border-radius:22px;max-height:340px;width:100%;object-fit:cover;border:1px solid var(--line)}
.security-grid,.page-card-grid{display:grid;gap:16px;margin-top:22px}
.help-card{padding:20px}
.responsible-box{background:#fff;border:1px solid var(--line);border-left:6px solid var(--brand);border-radius:18px;padding:22px;box-shadow:0 8px 24px rgba(0,0,0,.04)}
.responsible-box p{margin:0;color:#4d4d4d}.responsible-box p+p{margin-top:10px}
.faq-list{display:grid;gap:14px;margin-top:22px}
.faq-item{padding:20px}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:#555}
.cta-box{border-radius:28px;background:linear-gradient(135deg,rgba(213,5,5,.09),#fff);border:1px solid rgba(213,5,5,.16);padding:30px;text-align:center;box-shadow:var(--shadow)}
.cta-box h2{margin:0 0 10px;font-size:28px}.cta-box p{margin:0 auto 20px;color:#555;max-width:720px}
.page-hero{background:linear-gradient(180deg,#fff 0%,#f7f7f7 100%);border-bottom:1px solid var(--line);padding:44px 0 34px}
.breadcrumb{display:flex;gap:8px;align-items:center;flex-wrap:wrap;color:#777;font-size:14px;margin-bottom:12px}.breadcrumb a{color:var(--brand);font-weight:700}
.page-hero h1{font-size:32px;line-height:1.25;margin:0 0 14px;color:#111}.page-hero p{margin:0;color:#555;max-width:820px;font-size:16px}
.article-layout{display:grid;gap:22px}.article-main{display:grid;gap:20px}.article-section{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:0 8px 24px rgba(0,0,0,.04)}
.article-section h2{margin:0 0 12px;font-size:24px}.article-section p{margin:0 0 12px;color:#555}.article-section p:last-child{margin-bottom:0}
.side-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 8px 24px rgba(0,0,0,.04);align-self:start}
.side-panel h2{margin:0 0 12px;font-size:20px}.side-panel a{display:block;padding:10px 0;border-bottom:1px solid var(--line);color:var(--brand);font-weight:700}.side-panel a:last-child{border-bottom:0}
.notice-list{margin:0;padding:0;list-style:none;display:grid;gap:10px}.notice-list li{padding:12px 14px;background:#fafafa;border:1px solid var(--line);border-radius:14px;color:#4d4d4d}
.step-list{counter-reset:step;display:grid;gap:14px;margin-top:18px}.step-item{position:relative;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px 18px 18px 58px;box-shadow:0 8px 22px rgba(0,0,0,.04)}
.step-item:before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.download-panel{text-align:center;background:#fff;border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:var(--shadow)}
.download-panel img{width:min(420px,100%);margin:0 auto 20px;border-radius:24px;border:1px solid var(--line)}
.site-footer{background:#202020;color:#eee;margin-top:0}.footer-grid{display:grid;gap:24px;padding:42px 0}.footer-logo img{height:42px;width:auto;margin-bottom:12px}.site-footer p{color:#cfcfcf;margin:0}.site-footer h3{margin:0 0 12px;font-size:17px;color:#fff}.site-footer a{display:block;color:#eee;margin:7px 0}.site-footer a:hover{color:#fff;text-decoration:underline}.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;color:#cfcfcf;font-size:14px}
@media (min-width:640px){
    .brand-ribbon{grid-template-columns:repeat(3,1fr)}
    .category-main-grid{grid-template-columns:repeat(2,1fr)}
    .category-sub-grid{grid-template-columns:repeat(2,1fr)}
    .focus-grid{grid-template-columns:repeat(2,1fr)}
    .security-grid,.page-card-grid{grid-template-columns:repeat(2,1fr)}
    .data-card-grid{grid-template-columns:repeat(3,1fr)}
}
@media (min-width:900px){
    .mobile-header,.mobile-nav{display:none!important}
    .desktop-header{display:block}
    .section{padding:78px 0}
    .official-hero{padding:68px 0 44px}
    .hero-grid{grid-template-columns:1.05fr .95fr;gap:46px}
    .hero-title{font-size:52px}
    .hero-text{font-size:18px}
    .hero-visual img{height:430px}
    .hero-note{grid-template-columns:repeat(3,1fr);max-width:720px}
    .category-main-grid{grid-template-columns:repeat(4,1fr)}
    .category-main-card{min-height:260px}
    .category-main-card:nth-child(1),.category-main-card:nth-child(4){transform:translateY(18px)}
    .category-sub-grid{grid-template-columns:repeat(4,1fr)}
    .info-split{grid-template-columns:1fr 1fr}
    .showcase{grid-template-columns:1fr 1fr;gap:46px}
    .score-layout{grid-template-columns:.95fr 1.05fr;gap:44px}
    .app-showcase{grid-template-columns:.95fr 1.05fr;padding:34px}
    .security-grid{grid-template-columns:repeat(3,1fr)}
    .page-card-grid{grid-template-columns:repeat(3,1fr)}
    .article-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}
    .page-hero{padding:66px 0 48px}.page-hero h1{font-size:44px}
    .footer-grid{grid-template-columns:1.3fr .8fr .8fr 1.1fr}
}
@media (min-width:1180px){.desktop-nav a{padding-left:16px;padding-right:16px}.section-title{font-size:34px}}