:root{
    --red: #111827;
    --dark-red: #030712;
    --text: #111827;
    --muted: #6b7280;
    --light: #f5f5f5;
    --line: #e5e7eb;
    --white: #fff;
    --shadow: 0 16px 38px rgba(0,0,0,.12);
    --radius: 22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC",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}
.site-header{background:linear-gradient(135deg, #1f2937 0%, #030712 100%);position:relative;z-index:10;box-shadow:0 10px 30px rgba(0,0,0,.24)}
.header-shell{max-width:1180px;margin:0 auto;padding:0 20px}
.desktop-header{height:76px;display:none;align-items:center;gap:24px}
.brand img{width:148px;height:auto}
.desktop-nav{display:flex;align-items:center;gap:6px;flex:1;justify-content:center}
.desktop-nav a{color:#fff;padding:8px 14px;border-radius:999px;font-size:15px;white-space:nowrap;transition:.2s ease}
.desktop-nav a:hover,.desktop-nav a.active{background:#fff;color:var(--red)}
.top-action,.mobile-action{background:#fff;color:var(--red);font-weight:700;border-radius:999px;padding:9px 20px;box-shadow:0 8px 20px rgba(0,0,0,.12);white-space:nowrap}
.mobile-header{height:64px;display:grid;grid-template-columns:64px 1fr 76px;align-items:center;padding:0 12px;background:linear-gradient(135deg, #1f2937 0%, #030712 100%)}
.menu-toggle{width:42px;height:42px;border:0;background:rgba(255,255,255,.15);color:#fff;border-radius:14px;font-size:22px;cursor:pointer}
.mobile-logo{justify-self:center}.mobile-logo img{width:118px}.mobile-action{justify-self:end;padding:7px 14px;font-size:14px}
.mobile-nav{display:none;background:#fff;padding:8px 14px 16px;border-radius:0 0 22px 22px;box-shadow:0 15px 30px rgba(0,0,0,.12)}
.mobile-nav.open{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.mobile-nav a{padding:10px 12px;border-radius:12px;background:#f7f7f7;color:#333;font-size:14px}
.section{padding:56px 18px}.section.alt{background:var(--light)}
.container{max-width:1180px;margin:0 auto}.narrow{max-width:920px;margin:0 auto}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:rgba(17,24,39,.08);color:var(--red);padding:5px 12px;border-radius:999px;font-weight:700;font-size:14px;margin-bottom:12px}
.hero{background:linear-gradient(135deg, #1f2937 0%, #030712 100%);color:#fff;padding:42px 18px 64px;position:relative;overflow:hidden}
.hero:after{content:"";position:absolute;inset:auto -80px -180px auto;width:420px;height:420px;background:rgba(255,255,255,.09);border-radius:50%}
.hero-inner{max-width:1180px;margin:0 auto;display:grid;gap:30px;align-items:center;position:relative;z-index:1}
.hero h1,.page-hero h1{font-size:34px;line-height:1.18;margin:0 0 18px;font-weight:800;letter-spacing:-.5px}
.hero p{font-size:16px;color:rgba(255,255,255,.92);margin:0 0 22px}.hero-text{max-width:660px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0 0}.hero-tags span{background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.22);padding:7px 12px;border-radius:999px;font-size:14px}
.main-btn{display:inline-flex;align-items:center;justify-content:center;background:var(--red);color:#fff;border-radius:999px;padding:12px 24px;font-weight:800;box-shadow:0 12px 24px rgba(17,24,39,.26);transition:.2s ease}.hero .main-btn,.cta-band .main-btn{background:#fff;color:var(--red)}
.main-btn:hover{transform:translateY(-2px);filter:brightness(.95)}
.hero-visual{position:relative}.hero-visual img{border-radius:28px;box-shadow:0 20px 50px rgba(0,0,0,.2);width:100%;object-fit:cover}.hero-card{background:#fff;color:#222;border-radius:18px;padding:16px;box-shadow:var(--shadow);margin-top:14px;border:1px solid rgba(255,255,255,.5)}
.hero-card strong{color:var(--red);display:block;margin-bottom:4px}.hero-card p{color:#555;margin:0;font-size:14px}
.section-title{display:flex;flex-direction:column;gap:8px;margin-bottom:26px}.section-title h2{font-size:28px;line-height:1.25;margin:0}.section-title p{color:var(--muted);max-width:780px;margin:0}
.category-grid{display:grid;gap:16px}.feature-card,.match-card,.data-card,.info-card,.security-card,.faq-item,.step-card,.link-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 10px 24px rgba(0,0,0,.04)}
.feature-card.large{min-height:245px}.feature-card h3,.match-card h3,.data-card h3,.info-card h3,.security-card h3,.step-card h3,.link-card h3{margin:0 0 10px;font-size:20px}.feature-card p,.match-card p,.data-card p,.info-card p,.security-card p,.step-card p,.link-card p{color:var(--muted);margin:0 0 14px}.text-link{color:var(--red);font-weight:800}.text-link:after{content:" →"}.badge{display:inline-flex;color:var(--red);background:rgba(17,24,39,.08);border-radius:999px;padding:4px 10px;font-size:13px;font-weight:700;margin-bottom:12px}
.match-grid,.data-grid,.security-grid,.info-grid,.steps-grid,.links-grid{display:grid;gap:16px}.showcase,.split{display:grid;gap:28px;align-items:center}.showcase img,.split img,.page-visual img{border-radius:28px;box-shadow:var(--shadow);border:1px solid var(--line)}
.point-list{display:grid;gap:12px;margin-top:18px}.point{border-left:4px solid var(--red);background:#fff;border-radius:14px;padding:12px 14px;box-shadow:0 8px 18px rgba(0,0,0,.04)}.point strong{display:block;color:#222}.point span{color:var(--muted);font-size:14px}
.score-panel{background:#fff;border:1px solid var(--line);border-radius:28px;padding:18px;box-shadow:var(--shadow)}
.score-row{display:grid;grid-template-columns:1fr auto 1fr;gap:12px;align-items:center;padding:14px;border-bottom:1px solid var(--line)}.score-row:last-child{border-bottom:0}.score-row strong{text-align:center;color:var(--red);font-size:20px}.score-row span{color:#444;font-weight:700}.score-row small{display:block;color:var(--muted);font-weight:400}
.platform-columns{display:grid;gap:18px}.column-box{background:#fff;border:1px solid var(--line);border-radius:28px;padding:24px}.column-box h3{margin:0 0 16px}.column-box article{padding:14px 0;border-top:1px solid var(--line)}.column-box article:first-of-type{border-top:0;padding-top:0}.column-box h4{margin:0 0 6px;color:#222}.column-box p{margin:0;color:var(--muted)}
.responsible-box{background:linear-gradient(135deg, rgba(17,24,39,.08), rgba(213,5,5,.02));border:1px solid rgba(17,24,39,.14);border-radius:28px;padding:26px}.responsible-box p{margin:0;color:#444}.responsible-list{display:grid;gap:10px;margin-top:16px}.responsible-list span{background:#fff;border:1px solid var(--line);border-radius:14px;padding:10px 12px;color:#444}
.faq-list{display:grid;gap:14px}.faq-item h3{font-size:18px;margin:0 0 8px}.faq-item p{margin:0;color:var(--muted)}
.cta-band{padding:44px 20px;background:linear-gradient(135deg, #1f2937 0%, #030712 100%);color:#fff;text-align:center}.cta-band h2{margin:0 0 10px;font-size:28px}.cta-band p{max-width:740px;margin:0 auto 20px;color:rgba(255,255,255,.9)}
.page-hero{background:linear-gradient(135deg, #1f2937 0%, #030712 100%);color:#fff;padding:46px 18px}.page-hero .container{display:grid;gap:20px;align-items:center}.page-hero p{color:rgba(255,255,255,.92);margin:0;max-width:780px}.breadcrumb{font-size:14px;color:rgba(255,255,255,.78);margin-bottom:10px}.breadcrumb a{color:#fff;font-weight:700}
.content-block{background:#fff;border:1px solid var(--line);border-radius:28px;padding:26px;box-shadow:0 10px 24px rgba(0,0,0,.04);margin-bottom:18px}.content-block h2{margin:0 0 12px;font-size:24px}.content-block p{color:var(--muted);margin:0 0 12px}.content-block ul{margin:12px 0 0;padding-left:20px;color:var(--muted)}.content-block li{margin:8px 0}.notice{background:#f3f4f6;border:1px solid rgba(17,24,39,.18);color:#444;border-radius:22px;padding:20px;margin-top:18px}.notice strong{color:var(--red)}
.site-footer{background:#202124;color:#f1f1f1;padding:44px 18px 18px}.footer-inner{max-width:1180px;margin:0 auto;display:grid;gap:28px}.footer-brand img{width:142px;margin-bottom:12px}.footer-brand p{color:#cfcfcf;margin:0;max-width:460px}.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:20px}.footer-links h3{font-size:16px;margin:0 0 10px;color:#fff}.footer-links a{display:block;color:#cfcfcf;margin:7px 0}.footer-links a:hover{color:#fff}.footer-bottom{max-width:1180px;margin:26px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);color:#bdbdbd;font-size:13px}
@media (min-width: 640px){
    .hero h1,.page-hero h1{font-size:42px}.category-grid{grid-template-columns:repeat(2,1fr)}.match-grid,.data-grid,.security-grid,.steps-grid,.links-grid{grid-template-columns:repeat(2,1fr)}.footer-links{grid-template-columns:repeat(3,1fr)}
}
@media (min-width: 920px){
    .desktop-header{display:flex}.mobile-header,.mobile-nav{display:none!important}.hero{padding:70px 20px 86px}.hero-inner{grid-template-columns:1.05fr .95fr}.page-hero .container{grid-template-columns:1fr auto}.page-visual{width:360px}.category-grid{grid-template-columns:repeat(4,1fr)}.feature-card.large{grid-column:span 2}.match-grid,.data-grid{grid-template-columns:repeat(3,1fr)}.security-grid{grid-template-columns:repeat(3,1fr)}.info-grid{grid-template-columns:repeat(3,1fr)}.steps-grid,.links-grid{grid-template-columns:repeat(4,1fr)}.showcase,.split{grid-template-columns:1fr 1fr}.platform-columns{grid-template-columns:1fr 1fr}.footer-inner{grid-template-columns:1fr 1.35fr}.section{padding:76px 20px}.hero-card{position:absolute;right:22px;bottom:-20px;max-width:290px;margin:0}.hero-visual img{min-height:390px}.score-panel{padding:26px}
}
@media (max-width: 380px){.mobile-header{grid-template-columns:54px 1fr 66px;padding:0 8px}.mobile-logo img{width:104px}.mobile-action{padding:6px 10px}.hero h1,.page-hero h1{font-size:30px}.section{padding-left:14px;padding-right:14px}}