:root{
    --primary: rgb(213, 5, 5);
    --header-red: rgb(180, 4, 4);
    --primary-dark: rgb(170, 2, 2);
    --text: #1f1f1f;
    --muted: #666;
    --light: #f6f6f6;
    --line: #ececec;
    --card: #ffffff;
    --shadow: 0 12px 32px rgba(0,0,0,.08);
    --radius: 18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.75;-webkit-text-size-adjust:100%}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.site-header{position:relative;z-index:20;background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.desktop-topbar{display:none;background:var(--header-red);color:#fff;font-size:13px}
.topbar-inner{height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.header-main{background:#fff;border-bottom:3px solid var(--header-red)}
.header-inner{height:62px;display:grid;grid-template-columns:48px 1fr auto;align-items:center;gap:12px;position:relative}
.brand{justify-self:center;display:flex;align-items:center}
.logo{height:38px;width:auto;object-fit:contain}
.menu-btn{width:42px;height:42px;border:0;background:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;border-radius:12px;cursor:pointer}
.menu-btn span{display:block;width:24px;height:2px;background:#222;border-radius:8px;transition:.2s}
.menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.open span:nth-child(2){opacity:0}
.menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.desktop-nav,.search-icon{display:none}
.top-action,.main-btn{display:inline-flex;align-items:center;justify-content:center;background:var(--primary);color:#fff;border-radius:999px;font-weight:700;line-height:1;box-shadow:0 10px 22px rgba(213,5,5,.18);transition:.2s}
.top-action{height:38px;padding:0 17px;font-size:14px;justify-self:end}
.top-action:hover,.main-btn:hover{background:var(--primary-dark);transform:translateY(-1px)}
.mobile-nav{display:none;background:#fff;border-top:1px solid var(--line);border-bottom:3px solid var(--header-red);padding:8px 16px 14px;grid-template-columns:1fr 1fr;gap:8px}
.mobile-nav.open{display:grid}
.mobile-nav-link{font-size:14px;padding:10px 12px;border-radius:12px;background:#f7f7f7;color:#333;text-align:center}
.mobile-nav-link.active{background:rgba(213,5,5,.1);color:var(--primary);font-weight:700}
main{overflow:hidden}
.section{padding:54px 0}
.section.light{background:var(--light)}
.section-title{margin:0 0 12px;font-size:28px;line-height:1.25;color:#151515;letter-spacing:-.5px}
.section-lead{margin:0 0 28px;color:#5b5b5b;font-size:16px;max-width:780px}
.main-btn{padding:16px 26px;font-size:16px;min-height:48px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-weight:700;margin-top:10px}
.text-link::after{content:"›";font-size:20px;line-height:1}
.official-hero{background:linear-gradient(180deg,#fff 0%,#fff5f5 100%);padding:38px 0 44px;position:relative}
.official-hero::before{content:"";position:absolute;left:0;right:0;top:0;height:6px;background:var(--header-red)}
.hero-grid{display:grid;gap:28px;align-items:center}
.hero-copy .eyebrow,.eyebrow{display:inline-flex;align-items:center;border-radius:999px;background:rgba(213,5,5,.08);color:var(--primary);font-weight:700;font-size:13px;padding:6px 12px;margin-bottom:14px}
.hero-copy h1{font-size:34px;line-height:1.18;margin:0 0 16px;color:#111;letter-spacing:-1px}
.hero-copy p{font-size:17px;color:#4d4d4d;margin:0 0 22px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.hero-tags span{background:#fff;border:1px solid #f0d4d4;color:#333;border-radius:999px;padding:7px 12px;font-size:13px}
.hero-media{background:#fff;border-radius:24px;padding:12px;box-shadow:var(--shadow);position:relative}
.hero-media img{border-radius:18px;width:100%;height:260px;object-fit:cover}
.hero-card-note{position:absolute;left:20px;right:20px;bottom:20px;background:rgba(255,255,255,.94);border-left:4px solid var(--primary);border-radius:14px;padding:12px 14px;box-shadow:0 10px 28px rgba(0,0,0,.08);font-size:14px;color:#333}
.category-nav{background:#fff}
.category-main-grid{display:grid;gap:16px;margin-bottom:16px}
.category-sub-grid{display:grid;gap:14px}
.category-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:0 10px 26px rgba(0,0,0,.05);padding:22px;position:relative;overflow:hidden}
.category-card::before{content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--primary)}
.category-card h3{margin:0 0 10px;font-size:21px}
.category-card p{margin:0;color:#5d5d5d;font-size:15px}
.category-card.sub{padding:18px;background:#fafafa}
.category-card.sub h3{font-size:18px}
.focus-grid{display:grid;gap:16px}
.focus-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 10px 28px rgba(0,0,0,.05)}
.focus-badge{display:inline-flex;background:var(--primary);color:#fff;border-radius:999px;font-size:12px;font-weight:700;padding:5px 10px;margin-bottom:12px}
.focus-card h3{margin:0 0 9px;font-size:20px}.focus-card p{margin:0;color:#5c5c5c}
.info-split{display:grid;gap:20px;align-items:start}
.info-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 10px 28px rgba(0,0,0,.05)}
.info-panel h3{margin:0 0 16px;font-size:23px}
.info-item{padding:15px 0;border-top:1px solid var(--line)}
.info-item:first-of-type{border-top:0;padding-top:0}
.info-item strong{display:block;font-size:17px;margin-bottom:5px}.info-item p{margin:0;color:#5c5c5c;font-size:15px}
.info-image{border-radius:18px;overflow:hidden;margin-top:18px;border:1px solid var(--line)}
.info-image img{width:100%;height:220px;object-fit:cover}
.showcase,.score-data,.app-showcase{display:grid;gap:24px;align-items:center}
.showcase-media,.app-media{border-radius:24px;overflow:hidden;box-shadow:var(--shadow);background:#fff;padding:10px}
.showcase-media img,.app-media img{border-radius:18px;width:100%;height:250px;object-fit:cover}
.check-list{list-style:none;margin:18px 0 0;padding:0;display:grid;gap:10px}
.check-list li{position:relative;padding-left:28px;color:#454545}.check-list li::before{content:"";position:absolute;left:0;top:8px;width:14px;height:14px;border-radius:50%;background:var(--primary);box-shadow:inset 0 0 0 4px #fff;border:1px solid var(--primary)}
.data-board{display:grid;gap:14px}
.data-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:0 8px 24px rgba(0,0,0,.05)}
.data-card .num{display:block;color:var(--primary);font-size:26px;font-weight:800;line-height:1;margin-bottom:8px}.data-card h3{margin:0 0 8px;font-size:18px}.data-card p{margin:0;color:#5b5b5b;font-size:15px}
.security-grid{display:grid;gap:16px}.security-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px;box-shadow:0 10px 26px rgba(0,0,0,.05)}.security-card h3{margin:0 0 9px;font-size:19px}.security-card p{margin:0;color:#5b5b5b}
.responsible-box{background:#f8f8f8;border-left:6px solid var(--primary);border-radius:18px;padding:22px;box-shadow:0 8px 24px rgba(0,0,0,.04)}.responsible-box h2{margin:0 0 12px;font-size:25px}.responsible-box p{margin:0;color:#555}.responsible-box ul{margin:16px 0 0;padding-left:20px;color:#444}
.faq-list{display:grid;gap:14px}.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px;box-shadow:0 8px 20px rgba(0,0,0,.04)}.faq-item h3{margin:0 0 8px;font-size:18px}.faq-item p{margin:0;color:#5b5b5b}
.cta-panel{background:linear-gradient(135deg,#fff,#fff1f1);border:1px solid #f2d6d6;border-radius:24px;padding:28px;text-align:center;box-shadow:var(--shadow)}.cta-panel h2{margin:0 0 10px;font-size:26px}.cta-panel p{margin:0 auto 18px;color:#5a5a5a;max-width:760px}
.page-hero{padding:46px 0;background:linear-gradient(180deg,#fff5f5,#fff);border-bottom:1px solid var(--line)}
.page-hero h1{font-size:32px;line-height:1.22;margin:0 0 14px;color:#111}.page-hero p{margin:0;color:#555;font-size:17px;max-width:860px}
.page-grid{display:grid;gap:22px}.content-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:22px;box-shadow:0 10px 26px rgba(0,0,0,.05)}.content-card h2{margin:0 0 12px;font-size:24px}.content-card h3{margin:16px 0 8px;font-size:19px}.content-card p{color:#555;margin:0 0 12px}.content-card p:last-child{margin-bottom:0}
.feature-grid{display:grid;gap:16px}.feature-card{border:1px solid var(--line);border-radius:18px;background:#fff;padding:20px}.feature-card h3{margin:0 0 8px}.feature-card p{margin:0;color:#5a5a5a}
.tip-box{border-left:5px solid var(--primary);background:#f8f8f8;border-radius:16px;padding:20px}.tip-box h2{margin:0 0 10px}.tip-box p,.tip-box li{color:#555}.tip-box ul{margin:10px 0 0;padding-left:20px}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}.related-links a{border:1px solid #f0d0d0;color:var(--primary);border-radius:999px;padding:8px 14px;background:#fff;font-weight:700;font-size:14px}
.steps{counter-reset:step;display:grid;gap:14px;margin:18px 0}.step{position:relative;padding:18px 18px 18px 60px;background:#fff;border:1px solid var(--line);border-radius:16px}.step::before{counter-increment:step;content:counter(step);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}.step h3{margin:0 0 6px}.step p{margin:0;color:#555}
.contact-list{display:grid;gap:12px}.contact-line{padding:16px;border:1px solid var(--line);border-radius:16px;background:#fff}.contact-line strong{display:block;margin-bottom:5px}.contact-line span{color:#555}
.site-footer{background:#222;color:#eee;margin-top:0}.footer-grid{display:grid;gap:24px;padding:42px 0}.footer-brand img{height:42px;width:auto;margin-bottom:14px}.site-footer p{color:#cfcfcf;margin:0}.site-footer h3{font-size:17px;margin:0 0 10px;color:#fff}.site-footer a{display:block;color:#ddd;margin:7px 0}.site-footer a:hover{color:#fff}.footer-note{border-top:1px solid rgba(255,255,255,.12);padding:16px 0;font-size:13px;color:#cfcfcf}.footer-note p+ p{margin-top:6px}
@media (min-width:640px){.category-sub-grid,.focus-grid,.security-grid,.feature-grid,.data-board{grid-template-columns:repeat(2,1fr)}.hero-media img{height:330px}.page-hero h1{font-size:38px}.section-title{font-size:34px}}
@media (min-width:900px){.desktop-topbar{display:block}.header-main{border-bottom:1px solid var(--line)}.header-inner{height:78px;grid-template-columns:auto 1fr auto auto;gap:22px}.menu-btn{display:none}.brand{justify-self:start}.logo{height:48px}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:8px}.nav-link{padding:10px 12px;border-radius:999px;color:#333;font-weight:700;font-size:15px}.nav-link:hover,.nav-link.active{background:rgba(213,5,5,.08);color:var(--primary)}.search-icon{display:block;width:38px;height:38px;border:1px solid var(--line);border-radius:50%;position:relative}.search-icon::before{content:"";position:absolute;left:11px;top:10px;width:12px;height:12px;border:2px solid #555;border-radius:50%}.search-icon::after{content:"";position:absolute;left:23px;top:24px;width:9px;height:2px;background:#555;transform:rotate(45deg);border-radius:2px}.top-action{height:42px;padding:0 24px}.mobile-nav{display:none!important}.official-hero{padding:64px 0}.hero-grid{grid-template-columns:1fr .92fr;gap:48px}.hero-copy h1{font-size:52px}.hero-copy p{font-size:18px}.hero-media img{height:430px}.category-main-grid{grid-template-columns:repeat(4,1fr)}.category-card.main{min-height:250px}.category-sub-grid{grid-template-columns:repeat(4,1fr)}.focus-grid{grid-template-columns:repeat(4,1fr)}.info-split{grid-template-columns:1fr 1fr}.showcase,.score-data,.app-showcase{grid-template-columns:1fr 1fr;gap:44px}.score-data .data-board{grid-template-columns:1fr}.security-grid{grid-template-columns:repeat(3,1fr)}.feature-grid{grid-template-columns:repeat(3,1fr)}.page-grid{grid-template-columns:1.1fr .9fr}.section{padding:78px 0}.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1fr}}
@media (min-width:1100px){.nav-link{padding:11px 15px}.category-card.main:first-child{grid-column:span 1}.showcase-media img,.app-media img{height:360px}.info-image img{height:260px}}