*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:#e2e8f0;background:#060c1a;background-image:radial-gradient(800px 600px at 85% -10%,rgba(0,212,212,.18),transparent 60%),radial-gradient(900px 700px at 0% 0%,rgba(56,189,248,.12),transparent 55%),radial-gradient(1200px 800px at 50% 100%,rgba(99,102,241,.10),transparent 60%);background-attachment:fixed;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}
.narrow{max-width:860px;margin:0 auto;padding:0 1.5rem}

/* Header */
.site-header{position:sticky;top:0;z-index:50;backdrop-filter:blur(14px);background:rgba(6,12,26,.72);border-bottom:1px solid rgba(148,163,184,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.05rem;letter-spacing:.5px;white-space:nowrap}
.brand-logo{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,#00d4d4,#6366f1);display:grid;place-items:center;color:#060c1a;font-weight:800;font-size:.85rem}
.nav{display:flex;align-items:center;gap:1.15rem;font-size:.9rem}
.nav a{color:#94a3b8;transition:color .2s;white-space:nowrap}
.nav a:hover{color:#00d4d4}
.nav .nav-cta{color:#00d4d4;font-weight:600}
/* 核心业务直达入口（小然平台 / 资产信息业务）——高亮区分，900px 以下仍可见 */
.nav .nav-cta-core{color:#00e5e5;background:rgba(0,212,212,.12);border:1px solid rgba(0,212,212,.38);border-radius:999px;padding:.32rem .75rem;margin-left:.3rem}
.nav .nav-cta-core:hover{background:rgba(0,212,212,.24);color:#7ff5f5;border-color:rgba(0,212,212,.6)}
@media(max-width:900px){.nav .nav-cta-core{display:inline-block;font-size:.8rem;padding:.28rem .6rem}}
/* 移动端空间有限：只保留两个核心业务入口（小然平台 / 资产信息业务），
   另两个平台在首屏「核心平台直达」行与核心平台区块中同样可达 */
@media(max-width:900px){.nav .nav-cta:not(.nav-cta-core){display:none}}
@media(max-width:480px){.nav .nav-cta-core{font-size:.74rem;padding:.24rem .5rem;margin-left:.15rem}}

/* Hero */
.hero{position:relative;display:flex;align-items:center;padding:6rem 0 3.5rem;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:radial-gradient(2px 2px at 12% 22%,rgba(255,255,255,.55),transparent 60%),radial-gradient(1.5px 1.5px at 78% 18%,rgba(255,255,255,.4),transparent 60%),radial-gradient(2px 2px at 28% 72%,rgba(255,255,255,.5),transparent 60%),radial-gradient(1px 1px at 55% 35%,rgba(255,255,255,.35),transparent 60%);pointer-events:none}
.hero-inner{position:relative;text-align:center}
.hero-title{font-size:clamp(2.3rem,5vw,4rem);font-weight:800;line-height:1.15;margin:0 0 1.1rem;letter-spacing:-.02em}
.hero-title .accent{color:#00d4d4;display:block}
.hero-title .main{color:#f8fafc;display:block}
.hero-desc{max-width:760px;margin:0 auto 1.8rem;color:#94a3b8;font-size:clamp(.95rem,1.2vw,1.05rem)}
.hero-desc strong{color:#e2e8f0}
.btn{display:inline-block;padding:.8rem 1.6rem;border-radius:999px;font-weight:600;font-size:.92rem;transition:all .2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:linear-gradient(135deg,#00d4d4,#0891b2);color:#060c1a;box-shadow:0 10px 30px -10px rgba(0,212,212,.55)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 38px -10px rgba(0,212,212,.7)}
.btn-ghost{background:rgba(148,163,184,.08);color:#e2e8f0;border-color:rgba(148,163,184,.2);margin:.5rem .35rem 0}
.btn-ghost:hover{background:rgba(148,163,184,.16)}

/* Stats */
.stats{padding:2rem 0 1rem}
.stats-grid{display:grid;gap:1rem;grid-template-columns:repeat(2,minmax(0,1fr))}
@media(min-width:768px){.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.stats-card{border:1px solid rgba(148,163,184,.12);border-radius:18px;background:linear-gradient(160deg,rgba(15,23,42,.85),rgba(15,23,42,.55));padding:1.6rem 1rem;text-align:center;backdrop-filter:blur(6px)}
.stats-num{font-size:clamp(1.7rem,3.2vw,2.4rem);font-weight:800;color:#00d4d4;letter-spacing:-.02em}
.stats-label{color:#94a3b8;font-size:.9rem;margin-top:.25rem}

/* Section */
.section{padding:3.5rem 0}
.section-head{text-align:center;margin-bottom:2.5rem}
.section-title{font-size:clamp(1.6rem,3.2vw,2.2rem);font-weight:700;color:#f8fafc;margin:0 0 .6rem}
.section-sub{color:#94a3b8;max-width:720px;margin:0 auto}
.section-head.left{text-align:left}
.section-head.left .section-sub{margin:0}

/* Page hero (inner pages) */
.page-hero{padding:4.5rem 0 2.5rem;border-bottom:1px solid rgba(148,163,184,.08)}
.page-hero h1{font-size:clamp(1.9rem,4vw,2.8rem);font-weight:800;color:#f8fafc;margin:0 0 .8rem;letter-spacing:-.02em;line-height:1.25}
.page-hero .lead{color:#94a3b8;max-width:820px;font-size:1.02rem;margin:0}
.crumbs{font-size:.84rem;color:#64748b;margin-bottom:1.2rem}
.crumbs a{color:#94a3b8}
.crumbs a:hover{color:#00d4d4}
.crumbs .sep{margin:0 .45rem;opacity:.5}

/* Prose */
.prose h2{font-size:clamp(1.3rem,2.4vw,1.65rem);font-weight:700;color:#f8fafc;margin:2.6rem 0 .9rem;padding-left:.85rem;border-left:3px solid #00d4d4}
.prose h3{font-size:1.1rem;font-weight:700;color:#e2e8f0;margin:1.8rem 0 .6rem}
.prose p{color:#cbd5e1;margin:0 0 1.1rem;font-size:.98rem}
.prose strong{color:#f1f5f9;font-weight:650}
.prose ul{margin:0 0 1.3rem;padding-left:1.3rem}
.prose li{color:#cbd5e1;margin:.45rem 0;font-size:.96rem}
.prose .qa{background:linear-gradient(160deg,rgba(15,23,42,.72),rgba(15,23,42,.4));border:1px solid rgba(148,163,184,.14);border-radius:14px;padding:1.4rem 1.5rem;margin:0 0 1.1rem}
.prose .qa .q{font-weight:700;color:#00d4d4;font-size:1rem;margin:0 0 .55rem}
.prose .qa .a{color:#cbd5e1;font-size:.95rem;margin:0}
.prose .qa .a strong{color:#f1f5f9}

/* Callout */
.callout{border:1px solid rgba(0,212,212,.28);background:rgba(0,212,212,.06);border-radius:14px;padding:1.4rem 1.5rem;margin:1.6rem 0}
.callout .ct{font-weight:700;color:#00d4d4;margin:0 0 .5rem;font-size:.98rem}
.callout p{color:#cbd5e1;font-size:.94rem;margin:0 0 .6rem}
.callout p:last-child{margin:0}

/* Grid cards */
.biz-grid{display:grid;gap:1.1rem;grid-template-columns:repeat(1,minmax(0,1fr))}
@media(min-width:640px){.biz-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
.biz-card{position:relative;border:1px solid rgba(148,163,184,.12);background:linear-gradient(160deg,rgba(15,23,42,.7),rgba(15,23,42,.4));border-radius:16px;padding:1.6rem;transition:all .25s}
.biz-card:hover{transform:translateY(-4px);border-color:rgba(0,212,212,.45);box-shadow:0 18px 40px -16px rgba(0,212,212,.35)}
.biz-card h3{font-size:1.08rem;margin:0 0 .5rem;color:#f8fafc;font-weight:700}
.biz-card p{color:#94a3b8;margin:0;font-size:.92rem}
.biz-card .biz-more{display:inline-block;margin-top:.85rem;color:#00d4d4;font-size:.88rem;font-weight:600}
.biz-icon{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,rgba(0,212,212,.2),rgba(99,102,241,.2));border:1px solid rgba(0,212,212,.35);display:grid;place-items:center;color:#00d4d4;margin-bottom:.9rem}

/* Fact table */
.fact-table{width:100%;border-collapse:collapse;margin:1.2rem 0;font-size:.93rem}
.fact-table th,.fact-table td{border:1px solid rgba(148,163,184,.14);padding:.75rem .9rem;text-align:left;vertical-align:top}
.fact-table th{background:rgba(15,23,42,.6);color:#e2e8f0;font-weight:650;width:32%;white-space:nowrap}
.fact-table td{color:#cbd5e1}

/* Card list */
.card-list{display:grid;gap:1rem;grid-template-columns:1fr}
@media(min-width:768px){.card-list{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(min-width:1100px){.card-list.c3{grid-template-columns:repeat(3,minmax(0,1fr))}}
.item-card{border:1px solid rgba(148,163,184,.12);background:linear-gradient(160deg,rgba(15,23,42,.7),rgba(15,23,42,.4));border-radius:14px;padding:1.5rem}
.item-card h3{font-size:1.02rem;color:#f8fafc;margin:0 0 .5rem;font-weight:700}
.item-card p{color:#94a3b8;margin:0;font-size:.91rem}
.item-card .meta{font-size:.8rem;color:#64748b;margin-top:.7rem}

/* FAQ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{border:1px solid rgba(148,163,184,.12);border-radius:12px;background:rgba(15,23,42,.5);margin-bottom:.7rem;overflow:hidden}
.faq-item summary{padding:.95rem 1.2rem;cursor:pointer;color:#f8fafc;font-weight:600;font-size:.95rem;list-style:none;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::before{content:"+";color:#00d4d4;margin-right:.6rem;font-weight:700}
.faq-item[open] summary::before{content:"−"}
.faq-item summary:hover{color:#00d4d4}
.faq-item .faq-a{padding:0 1.2rem 1rem 2.3rem;color:#94a3b8;font-size:.92rem;margin:0}

/* Footer */
.site-footer{border-top:1px solid rgba(148,163,184,.1);padding:2.5rem 0;color:#64748b;font-size:.85rem;text-align:center;background:rgba(2,6,23,.4)}
.site-footer a{color:#94a3b8;margin:0 .35rem}
.site-footer a:hover{color:#00d4d4}
.footer-nav{margin:1rem 0 .5rem;line-height:2.1}
.footer-nap{margin-top:1rem;line-height:1.95;font-size:.84rem}
.footer-nap strong{color:#94a3b8}
.update-date{margin-top:.7rem;font-size:.8rem;color:#475569}
.disclaim{font-size:.8rem;color:#475569;margin-top:.8rem;line-height:1.7}

/* CTA band */
.cta-band{border:1px solid rgba(0,212,212,.3);background:linear-gradient(135deg,rgba(0,212,212,.1),rgba(99,102,241,.08));border-radius:18px;padding:2.4rem 2rem;text-align:center;margin:2.5rem 0}
.cta-band h2{color:#f8fafc;font-size:1.35rem;margin:0 0 .6rem;border:0;padding:0}
.cta-band p{color:#94a3b8;margin:0 0 1.3rem;font-size:.95rem}

@media(max-width:900px){.nav .nav-text{display:none}}
@media(max-width:640px){.header-inner{height:56px}.hero{padding:3.5rem 0 2.5rem}}
@media print{body{background:#fff;color:#0f172a}.site-header,.site-footer{background:#fff}.prose p,.prose li,.prose .qa .a{color:#334155}}