:root{
    --brand: rgb(213, 5, 5);
    --brand-dark: rgb(180, 4, 4);
    --brand-deeper: rgb(154, 3, 3);
    --text: #151515;
    --muted: #666;
    --light: #f6f7f9;
    --line: #ececec;
    --card: #ffffff;
    --shadow: 0 12px 32px rgba(0,0,0,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;overflow-x:hidden}
body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
    color:var(--text);
    background:#fff;
    line-height:1.75;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1160px, calc(100% - 32px));margin:0 auto}
.site-header{background:#fff;position:relative;z-index:50;box-shadow:0 6px 20px rgba(0,0,0,.05)}
.desktop-topbar,.desktop-header{display:none}
.mobile-header{
    height:62px;
    display:grid;
    grid-template-columns:74px 1fr 86px;
    align-items:center;
    gap:6px;
    border-bottom:3px solid var(--brand-dark);
    background:#fff;
    position:relative;
}
.nav-toggle{position:absolute;opacity:0;pointer-events:none}
.menu-button{width:42px;height:42px;display:flex;flex-direction:column;justify-content:center;gap:5px;margin-left:16px;cursor:pointer}
.menu-button span{display:block;width:24px;height:2px;background:#222;border-radius:4px}
.mobile-logo{justify-self:center}
.mobile-logo img{height:34px;width:auto}
.logo img{height:42px;width:auto}
.top-action{
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand);color:#fff;
    padding:9px 18px;border-radius:999px;font-weight:700;
    box-shadow:0 8px 20px rgba(213,5,5,.18);
    transition:.2s ease;
}
.top-action:hover,.main-btn:hover{background:var(--brand-deeper);transform:translateY(-1px)}
.mobile-header .top-action{justify-self:end;margin-right:12px;padding:8px 14px;font-size:14px}
.mobile-nav{
    position:absolute;left:0;right:0;top:62px;
    background:#fff;border-bottom:3px solid var(--brand-dark);
    display:none;grid-template-columns:1fr 1fr;gap:0;
    padding:8px 16px 14px;
    box-shadow:0 16px 28px rgba(0,0,0,.08);
}
.nav-toggle:checked ~ .mobile-nav{display:grid}
.mobile-nav a{padding:11px 8px;border-bottom:1px solid #f0f0f0;color:#333;font-weight:600}
.mobile-nav a.active{color:var(--brand)}
.search-icon{width:24px;height:24px;border:2px solid #999;border-radius:50%;display:inline-block;position:relative}
.search-icon:after{content:"";position:absolute;width:9px;height:2px;background:#999;right:-7px;bottom:0;transform:rotate(45deg);border-radius:3px}
.section{padding:56px 0}
.section.light{background:var(--light)}
.section-title{margin:0 0 12px;font-size:28px;line-height:1.25;letter-spacing:-.02em}
.section-lead{margin:0 0 26px;color:var(--muted);max-width:820px}
.hero{
    background:
    radial-gradient(circle at 80% 15%, rgba(213,5,5,.13), transparent 34%),
    linear-gradient(180deg, #fff 0%, #fff5f5 100%);
    padding:42px 0 34px;
}
.hero-grid{display:grid;gap:30px;align-items:center}
.hero h1{font-size:34px;line-height:1.18;margin:0 0 18px;letter-spacing:-.03em}
.hero p{color:#444;margin:0 0 22px;font-size:16px}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:18px}
.hero-tags span,.pill{
    display:inline-flex;align-items:center;
    border:1px solid rgba(213,5,5,.18);
    color:var(--brand);
    background:#fff;
    border-radius:999px;
    padding:6px 12px;
    font-size:13px;
    font-weight:700;
}
.hero-visual{
    background:#fff;border:1px solid rgba(213,5,5,.1);
    border-radius:28px;padding:14px;box-shadow:var(--shadow);
}
.hero-visual img{border-radius:22px;min-height:220px;object-fit:cover;width:100%}
.main-btn{
    display:inline-flex;align-items:center;justify-content:center;
    background:var(--brand);color:#fff;
    padding:13px 24px;border-radius:999px;font-weight:800;
    min-height:46px;box-shadow:0 10px 26px rgba(213,5,5,.20);
    transition:.2s ease;
}
.text-link{color:var(--brand);font-weight:800}
.card{
    background:var(--card);border:1px solid var(--line);
    border-radius:18px;padding:22px;box-shadow:0 8px 20px rgba(0,0,0,.04)
}
.card h3{margin:0 0 10px;font-size:20px}
.card p{margin:0 0 14px;color:#555}
.category-main-grid{display:grid;gap:16px}
.category-sub-grid{display:grid;gap:14px;margin-top:16px}
.category-main-card{border-top:4px solid var(--brand);min-height:230px}
.category-sub-card{background:#fff;border-left:4px solid var(--brand);padding:18px}
.category-card .text-link{display:inline-flex;margin-top:6px}
.focus-grid{display:grid;gap:16px}
.focus-card{position:relative;overflow:hidden}
.focus-card:before{
    content:"";position:absolute;top:0;left:0;width:100%;height:4px;background:var(--brand)
}
.info-split{display:grid;gap:22px;align-items:start}
.info-panel{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:var(--shadow)}
.info-list{display:grid;gap:12px;margin-top:16px}
.info-item{padding:16px;border-radius:15px;background:#fafafa;border:1px solid #eee}
.info-item h3{font-size:18px;margin:0 0 6px}
.info-item p{margin:0;color:#555}
.info-visual{margin-top:16px;border-radius:18px;overflow:hidden}
.showcase{display:grid;gap:24px;align-items:center}
.showcase-image{border-radius:24px;overflow:hidden;box-shadow:var(--shadow);border:1px solid #eee}
.point-list{padding:0;margin:18px 0 0;list-style:none;display:grid;gap:10px}
.point-list li{padding-left:28px;position:relative;color:#444}
.point-list li:before{content:"";position:absolute;left:0;top:.75em;width:12px;height:12px;background:var(--brand);border-radius:50%}
.data-grid{display:grid;gap:20px;align-items:center}
.data-cards{display:grid;gap:14px}
.data-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px}
.data-card strong{display:block;color:var(--brand);font-size:22px;margin-bottom:6px}
.app-box{
    background:linear-gradient(135deg,#fff 0%,#fff4f4 100%);
    border:1px solid rgba(213,5,5,.12);border-radius:28px;padding:24px;
}
.security-grid{display:grid;gap:16px}
.responsible{
    background:#f7f7f7;border-left:6px solid var(--brand);
    border-radius:18px;padding:22px;
}
.faq-list{display:grid;gap:14px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px}
.faq-item h3{font-size:18px;margin:0 0 8px}
.faq-item p{margin:0;color:#555}
.cta{
    background:linear-gradient(135deg, rgba(213,5,5,.08), rgba(213,5,5,.02));
    border:1px solid rgba(213,5,5,.12);
    border-radius:28px;padding:28px;text-align:center
}
.page-hero{
    padding:46px 0;background:linear-gradient(180deg,#fff5f5 0%,#fff 100%);
    border-bottom:1px solid #f0e3e3;
}
.page-hero h1{font-size:32px;line-height:1.2;margin:0 0 14px}
.page-hero p{max-width:860px;color:#555;margin:0}
.page-layout{display:grid;gap:22px}
.content-block{background:#fff;border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 8px 22px rgba(0,0,0,.04)}
.content-block h2{margin:0 0 12px;font-size:24px}
.content-block p{margin:0 0 14px;color:#555}
.content-block p:last-child{margin-bottom:0}
.info-grid{display:grid;gap:16px}
.notice-list{background:#fafafa;border:1px solid #eee;border-radius:18px;padding:20px}
.notice-list h2{margin-top:0}
.notice-list ul{padding-left:20px;margin:0}
.notice-list li{margin:8px 0;color:#444}
.related-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.related-links a{border:1px solid rgba(213,5,5,.18);color:var(--brand);background:#fff;border-radius:999px;padding:8px 14px;font-weight:700}
.step-list{counter-reset:step;display:grid;gap:14px;padding:0;margin:18px 0;list-style:none}
.step-list li{counter-increment:step;background:#fff;border:1px solid #eee;border-radius:16px;padding:16px 16px 16px 56px;position:relative}
.step-list li:before{content:counter(step);position:absolute;left:16px;top:16px;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:#202020;color:#eee;padding:42px 0 22px}
.footer-grid{display:grid;gap:24px}
.footer-brand img{height:40px;margin-bottom:14px}
.site-footer h3{margin:0 0 12px;color:#fff;font-size:17px}
.site-footer p{color:#cfcfcf;margin:0 0 10px}
.site-footer a{display:block;color:#ddd;margin:8px 0}
.site-footer a:hover{color:#fff}
.footer-note{border-top:1px solid rgba(255,255,255,.12);margin-top:26px;padding-top:18px;font-size:13px;color:#cfcfcf}
@media (min-width: 640px){
    .category-sub-grid,.focus-grid,.security-grid,.info-grid{grid-template-columns:repeat(2,1fr)}
    .data-cards{grid-template-columns:repeat(3,1fr)}
}
@media (min-width: 900px){
    .mobile-header{display:none}
    .desktop-topbar{display:block;background:var(--brand-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;border-bottom:1px solid #f0f0f0}
    .desktop-nav-wrap{min-height:78px;display:flex;align-items:center;gap:28px}
    .desktop-nav{display:flex;align-items:center;gap:22px;flex:1;justify-content:center}
    .desktop-nav a{font-weight:700;color:#2d2d2d;padding:25px 0;border-bottom:3px solid transparent}
    .desktop-nav a.active,.desktop-nav a:hover{color:var(--brand);border-bottom-color:var(--brand)}
    .desktop-actions{display:flex;align-items:center;gap:22px}
    .hero{padding:70px 0 56px}
    .hero-grid{grid-template-columns:1.04fr .96fr}
    .hero h1{font-size:52px}
    .section{padding:76px 0}
    .section-title{font-size:36px}
    .category-main-grid{grid-template-columns:repeat(4,1fr)}
    .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{grid-template-columns:1fr 1fr}
    .showcase.reverse .showcase-image{order:2}
    .data-grid{grid-template-columns:1fr 1fr}
    .app-box{padding:34px}
    .security-grid{grid-template-columns:repeat(3,1fr)}
    .page-hero{padding:70px 0}
    .page-hero h1{font-size:44px}
    .page-layout{grid-template-columns:1.45fr .8fr}
    .footer-grid{grid-template-columns:1.5fr repeat(3,1fr)}
}
@media (min-width: 1100px){
    .desktop-nav{gap:28px}
}