:root{
    --brand: rgb(213, 5, 5);
    --brand-dark: rgb(168, 0, 0);
    --black: #111111;
    --text: #333333;
    --muted: #666666;
    --line: #eeeeee;
    --soft: #f7f7f7;
    --white: #ffffff;
    --radius: 18px;
    --shadow: 0 14px 34px rgba(17, 17, 17, .07);
}
*{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;font-size:16px;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{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.mobile-top{height:62px;display:grid;grid-template-columns:64px 1fr 82px;align-items:center;padding:0 12px;background:#fff}
.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{display:block;height:2px;width:24px;background:#222;border-radius:9px}
.mobile-logo{justify-self:center;display:flex;align-items:center;justify-content:center}
.logo img,.mobile-logo img,.desktop-logo img{height:36px;object-fit:contain}
.top-action{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border-radius:999px;padding:9px 17px;font-weight:700;font-size:14px;white-space:nowrap;box-shadow:0 8px 18px rgba(213,5,5,.18)}
.top-action:hover,.main-btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.desktop-top{display:none;height:78px;align-items:center;gap:24px;background:#fff}
.desktop-logo img{height:42px}
.desktop-nav{display:flex;align-items:center;gap:22px;flex:1;justify-content:center;white-space:nowrap}
.nav-link{font-size:15px;color:#2d2d2d;font-weight:600;padding:26px 0;border-bottom:3px solid transparent}
.nav-link:hover,.nav-link.active,.mobile-nav-link.active{color:var(--brand)}
.nav-link.active{border-bottom-color:var(--brand)}
.search-icon{width:22px;height:22px;border:2px solid #222;border-radius:50%;position:relative;display:inline-block;flex:0 0 auto}
.search-icon:after{content:"";position:absolute;width:9px;height:2px;background:#222;right:-7px;bottom:-3px;transform:rotate(45deg);border-radius:5px}
.mobile-nav{display:none;background:#fff;border-top:1px solid var(--line);padding:8px 16px 16px;box-shadow:0 18px 30px rgba(0,0,0,.06)}
.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mobile-nav-link{border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-weight:700;background:#fafafa;font-size:14px;text-align:center}
section{padding:56px 0}
.section-light{background:var(--soft)}
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#fff 0%,#fafafa 100%);padding:44px 0 58px}
.hero:before{content:"";position:absolute;inset:auto -120px -180px auto;width:360px;height:360px;border-radius:50%;background:rgba(213,5,5,.08)}
.hero-grid{display:grid;gap:32px;align-items:center;position:relative;z-index:1}
.eyebrow{display:inline-flex;align-items:center;gap:8px;color:var(--brand);font-weight:800;background:rgba(213,5,5,.08);border:1px solid rgba(213,5,5,.14);padding:6px 12px;border-radius:999px;font-size:14px;margin-bottom:12px}
h1{font-size:32px;line-height:1.22;color:var(--black);margin:0 0 16px;letter-spacing:-.5px}
h2{font-size:26px;line-height:1.3;color:var(--black);margin:0 0 14px}
h3{font-size:19px;line-height:1.35;color:var(--black);margin:0 0 10px}
p{margin:0 0 14px;color:var(--text)}
.lead{font-size:17px;color:#444;margin-bottom:22px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;background:var(--brand);color:#fff;border-radius:999px;padding:12px 24px;font-weight:800;transition:.2s ease;box-shadow:0 14px 28px rgba(213,5,5,.18)}
.btn-row{display:flex;gap:12px;flex-wrap:wrap;align-items:center;margin-top:18px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:20px 0 0;padding:0;list-style:none}
.hero-tags li{background:#fff;border:1px solid var(--line);border-radius:999px;padding:7px 12px;color:#333;font-size:14px;box-shadow:0 6px 14px rgba(0,0,0,.04)}
.hero-media{position:relative}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:12px;box-shadow:var(--shadow)}
.hero-card img{border-radius:18px;width:100%;height:auto;object-fit:cover}
.floating-panel{margin-top:-18px;margin-left:18px;margin-right:18px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px;box-shadow:0 12px 26px rgba(0,0,0,.08);position:relative}
.floating-panel strong{display:block;color:var(--brand);font-size:20px}
.section-head{max-width:760px;margin:0 auto 28px;text-align:center}
.section-head.align-left{text-align:left;margin-left:0}
.muted{color:var(--muted)}
.category-grid,.service-grid,.security-grid,.feature-grid,.link-grid,.faq-grid{display:grid;gap:18px}
.category-grid{grid-template-columns:1fr}
.card,.sports-card,.service-card,.score-card,.data-card,.faq-item,.info-card,.security-card,.notice-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 10px 24px rgba(0,0,0,.04)}
.sports-card{transition:.2s ease}
.sports-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card-tag{display:inline-flex;background:rgba(213,5,5,.08);color:var(--brand);font-weight:800;border-radius:999px;padding:5px 10px;font-size:13px;margin-bottom:10px}
.secondary-link{display:inline-flex;margin-top:8px;color:var(--brand);font-weight:800}
.secondary-link:after{content:"›";margin-left:6px}
.service-card{border-top:4px solid var(--brand)}
.media-grid,.split-grid,.app-showcase,.platform-info,.data-layout{display:grid;gap:28px;align-items:center}
.image-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:12px;box-shadow:var(--shadow)}
.image-panel img{border-radius:18px;width:100%}
.point-list{display:grid;gap:12px;margin:18px 0 0;padding:0;list-style:none}
.point-list li{display:grid;grid-template-columns:auto 1fr;gap:10px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px}
.point-list li:before{content:"";width:9px;height:9px;border-radius:50%;background:var(--brand);margin-top:10px}
.score-panel,.data-panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow)}
.score-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:12px;border-bottom:1px solid var(--line);padding:14px 0}
.score-row:last-child{border-bottom:0}
.score-row span{font-weight:700;color:#222}
.score-row strong{color:var(--brand);font-size:20px;white-space:nowrap}
.status{display:inline-flex;background:#f5f5f5;border-radius:999px;padding:4px 10px;font-size:12px;color:#444;margin-top:6px}
.data-cards{display:grid;gap:14px;margin-top:18px}
.data-card strong{display:block;color:var(--brand);font-size:22px;margin-bottom:4px}
.info-columns{display:grid;gap:18px}
.info-list{display:grid;gap:14px;margin-top:16px}
.info-list .info-card{padding:18px}
.notice-card{background:#fff8f8;border-color:rgba(213,5,5,.18)}
.notice-card h3{color:var(--brand)}
.faq-item details{margin:0}
.faq-item summary{cursor:pointer;font-weight:800;color:#111;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";float:right;color:var(--brand);font-size:22px;line-height:1}
.faq-item details[open] summary:after{content:"−"}
.faq-item p{margin-top:12px;margin-bottom:0;color:#4a4a4a}
.cta{background:var(--brand);color:#fff;text-align:center;padding:48px 0}
.cta h2,.cta p{color:#fff}
.cta .main-btn{background:#fff;color:var(--brand);box-shadow:none}
.cta .main-btn:hover{background:#f6f6f6;color:var(--brand-dark)}
.inner-hero{background:linear-gradient(180deg,#fff,#f8f8f8);padding:46px 0 40px;border-bottom:1px solid var(--line)}
.inner-hero .container{display:grid;gap:18px}
.breadcrumb{font-size:14px;color:#777;margin-bottom:8px}
.breadcrumb a{color:var(--brand);font-weight:700}
.article-layout{display:grid;gap:24px;padding:46px 0}
.content-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:0 10px 24px rgba(0,0,0,.04)}
.content-panel + .content-panel{margin-top:18px}
.check-list{display:grid;gap:12px;margin:16px 0 0;padding:0;list-style:none}
.check-list li{padding-left:26px;position:relative}
.check-list li:before{content:"";position:absolute;left:0;top:.72em;width:10px;height:10px;border-radius:50%;background:var(--brand)}
.inline-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.inline-links a{border:1px solid rgba(213,5,5,.2);color:var(--brand);background:#fff;border-radius:999px;padding:8px 13px;font-weight:800}
.steps{counter-reset:step;display:grid;gap:14px;margin-top:18px}
.step{counter-increment:step;background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 18px 18px 60px;position:relative}
.step:before{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}
.site-footer{background:#111;color:#ddd;padding:44px 0 22px}
.site-footer p,.site-footer span{color:#cfcfcf}
.footer-grid{display:grid;gap:28px}
.footer-logo{height:38px;margin-bottom:14px}
.site-footer h3{color:#fff;font-size:16px;margin-bottom:12px}
.site-footer a{display:block;color:#d8d8d8;margin:6px 0;font-size:14px}
.site-footer a:hover{color:#fff}
.footer-bottom{display:flex;gap:12px;flex-direction:column;border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:18px;font-size:13px}
@media (min-width: 640px){
    .category-grid{grid-template-columns:repeat(2,1fr)}
    .service-grid,.security-grid,.feature-grid,.link-grid,.faq-grid{grid-template-columns:repeat(2,1fr)}
    .data-cards{grid-template-columns:repeat(3,1fr)}
    h1{font-size:40px}
}
@media (min-width: 900px){
    .mobile-top,.mobile-nav{display:none!important}
    .desktop-top{display:flex}
    .hero-grid,.media-grid,.split-grid,.app-showcase,.platform-info,.data-layout{grid-template-columns:1.05fr .95fr}
    .category-grid{grid-template-columns:repeat(3,1fr)}
    .service-grid,.security-grid{grid-template-columns:repeat(3,1fr)}
    .feature-grid,.link-grid{grid-template-columns:repeat(4,1fr)}
    .faq-grid{grid-template-columns:repeat(2,1fr)}
    .info-columns{grid-template-columns:1fr 1fr}
    .article-layout{grid-template-columns:minmax(0,1fr) 320px;align-items:start}
    h1{font-size:48px}
    h2{font-size:32px}
    section{padding:72px 0}
}
@media (min-width: 1080px){
    .desktop-nav{gap:25px}
    .nav-link{font-size:16px}
}