/* ==========================================================================
   聚鑫汇官网 style.css
   Enterprise Risk Control Center / Financial Risk Lab 视觉系统
   原创样式表，无第三方框架、无远程字体
   ========================================================================== */

:root{
  /* 品牌色板：暖白 / 风险深蓝 / 信用青 / 预警橙 / 模型紫灰 / 石墨灰 / Risk Red（仅用于真实告警） */
  --c-bg:#f7f5f0;
  --c-bg-alt:#ffffff;
  --c-bg-soft:#efece3;
  --c-ink:#1c2230;
  --c-ink-soft:#4b5160;
  --c-graphite:#5b6070;
  --c-border:#e2ddd0;
  --c-border-strong:#cfc8b8;

  --c-blue:#1b3a63;
  --c-blue-dark:#122943;
  --c-blue-soft:#e7edf4;

  --c-teal:#0e6f79;
  --c-teal-soft:#e3f1f0;

  --c-orange:#b9722a;
  --c-orange-soft:#f7ecdd;

  --c-purple:#5b5480;
  --c-purple-soft:#ece9f4;

  --c-red:#a63a3a;
  --c-red-soft:#f6e6e4;

  --c-green:#3d7a52;
  --c-green-soft:#e5f0e6;

  --radius-sm:6px;
  --radius-md:12px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(28,34,48,.06), 0 1px 1px rgba(28,34,48,.04);
  --shadow-2:0 8px 24px rgba(28,34,48,.10);
  --maxw:1180px;
  --font-sans:"PingFang SC","Microsoft YaHei","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}

*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--c-bg);
  color:var(--c-ink);
  line-height:1.75;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:var(--c-blue);text-decoration:none;}
a:hover{text-decoration:underline;}
h1,h2,h3,h4{font-weight:700;line-height:1.4;margin:0 0 .6em;color:var(--c-ink);}
h1{font-size:1.9rem;}
h2{font-size:1.5rem;}
h3{font-size:1.2rem;}
p{margin:0 0 1em;}
ul,ol{padding-left:1.3em;}
table{border-collapse:collapse;width:100%;}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.section{padding:56px 0;}
.section-tight{padding:32px 0;}
.section-alt{background:var(--c-bg-alt);}
.section-soft{background:var(--c-bg-soft);}
.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}

/* ---------- Skip link ---------- */
.skip-link{position:absolute;left:-999px;top:auto;background:var(--c-blue);color:#fff;padding:10px 16px;border-radius:var(--radius-sm);z-index:999;}
.skip-link:focus{left:12px;top:12px;}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(247,245,240,.96);
  backdrop-filter:blur(6px);
  border-bottom:1px solid var(--c-border);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--c-ink);font-size:1.05rem;}
.brand:hover{text-decoration:none;}
.brand img{width:34px;height:34px;}
.brand small{display:block;font-weight:400;font-size:.68rem;color:var(--c-ink-soft);}

.nav-toggle{
  display:none;flex-direction:column;justify-content:center;gap:4px;
  width:40px;height:40px;border:1px solid var(--c-border-strong);background:var(--c-bg-alt);
  border-radius:var(--radius-sm);cursor:pointer;
}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--c-ink);margin:0 auto;}

.main-nav{display:flex;}
.main-nav ul{list-style:none;display:flex;gap:2px;margin:0;padding:0;}
.main-nav a{
  display:block;padding:10px 12px;border-radius:var(--radius-sm);
  color:var(--c-ink-soft);font-size:.92rem;white-space:nowrap;
}
.main-nav a:hover,.main-nav a[aria-current="page"]{
  background:var(--c-blue-soft);color:var(--c-blue);text-decoration:none;
}

/* ---------- Hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--c-blue) 0%,var(--c-blue-dark) 62%, #0d1f36 100%);
  color:#f3f1ea;padding:64px 0 56px;
}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.hero h1{color:#fff;font-size:2rem;margin-bottom:.5em;}
.hero p.lead{color:#d9dfe9;font-size:1.05rem;max-width:56ch;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0 22px;}
.hero-tags span{
  border:1px solid rgba(255,255,255,.28);color:#e7ebf3;
  border-radius:999px;padding:5px 12px;font-size:.78rem;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;}
.hero-media{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-lg);padding:18px;}

/* Page header for subpages (no dark hero) */
.page-header{background:var(--c-blue-soft);padding:44px 0 36px;border-bottom:1px solid var(--c-border);}
.page-header h1{color:var(--c-blue-dark);margin-bottom:.35em;}
.page-header p.lead{color:var(--c-ink-soft);max-width:70ch;font-size:1.02rem;}
.breadcrumb{font-size:.82rem;color:var(--c-ink-soft);margin-bottom:14px;}
.breadcrumb a{color:var(--c-ink-soft);}
.breadcrumb span[aria-current]{color:var(--c-ink);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:11px 20px;border-radius:999px;font-size:.92rem;font-weight:600;
  border:1px solid transparent;cursor:pointer;
}
.btn:hover{text-decoration:none;}
.btn-primary{background:#fff;color:var(--c-blue-dark);}
.btn-primary:hover{background:#eef1f6;}
.btn-outline{border-color:rgba(255,255,255,.5);color:#fff;}
.btn-outline:hover{background:rgba(255,255,255,.1);}
.btn-ghost{border-color:var(--c-border-strong);color:var(--c-ink);background:var(--c-bg-alt);}
.btn-ghost:hover{background:var(--c-bg-soft);}
.btn-block{width:100%;justify-content:center;}

/* ---------- Section headings ---------- */
.section-head{max-width:76ch;margin-bottom:28px;}
.eyebrow{
  display:inline-block;font-size:.76rem;letter-spacing:.04em;font-weight:700;
  color:var(--c-teal);text-transform:uppercase;margin-bottom:10px;
}
.section-head p{color:var(--c-ink-soft);}

/* ---------- Risk chain diagram strip ---------- */
.chain-strip{display:flex;flex-wrap:wrap;gap:10px;align-items:center;}
.chain-strip .node{
  background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:999px;
  padding:8px 14px;font-size:.85rem;color:var(--c-ink);white-space:nowrap;
}
.chain-strip .arrow{color:var(--c-border-strong);font-size:1.1rem;}

/* ---------- Article grid / cards ---------- */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.article-grid.cols-3{grid-template-columns:repeat(3,1fr);}
.card{
  background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-md);
  padding:22px;box-shadow:var(--shadow-1);
}
.card-feature{padding:26px;}
.card .meta{font-size:.78rem;color:var(--c-ink-soft);display:flex;gap:10px;align-items:center;margin-bottom:10px;}
.tag{
  display:inline-block;font-size:.72rem;font-weight:700;padding:3px 9px;border-radius:999px;
  background:var(--c-teal-soft);color:var(--c-teal);
}
.tag.tag-model{background:var(--c-purple-soft);color:var(--c-purple);}
.tag.tag-credit{background:var(--c-teal-soft);color:var(--c-teal);}
.tag.tag-market{background:var(--c-blue-soft);color:var(--c-blue);}
.tag.tag-ops{background:var(--c-orange-soft);color:var(--c-orange);}
.tag.tag-ai{background:var(--c-purple-soft);color:var(--c-purple);}
.tag.tag-app{background:var(--c-green-soft);color:var(--c-green);}
.card h3{margin-bottom:.5em;font-size:1.08rem;}
.card p{color:var(--c-ink-soft);font-size:.94rem;}
.card .read-more{font-size:.86rem;font-weight:600;}

.article-figure{margin:22px 0;}
.article-figure img{border:1px solid var(--c-border);border-radius:var(--radius-md);background:var(--c-bg-alt);}
.article-figure figcaption{font-size:.82rem;color:var(--c-ink-soft);margin-top:8px;}

/* ---------- Feature article full block (index big 8) ---------- */
.feature-article{
  background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-lg);
  padding:30px;margin-bottom:26px;
}
.feature-article .meta{display:flex;gap:10px;align-items:center;font-size:.8rem;color:var(--c-ink-soft);margin-bottom:10px;}
.feature-article h3{font-size:1.3rem;margin-bottom:.5em;}
.feature-article .diagram-strip{margin:16px 0;}
.article-more{display:none;}
.readmore-btn{
  margin-top:14px;background:none;border:1px solid var(--c-border-strong);border-radius:999px;
  padding:9px 18px;font-size:.86rem;font-weight:600;color:var(--c-blue);cursor:pointer;font-family:inherit;
}
.readmore-btn:hover{background:var(--c-blue-soft);}
.feature-article-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:50%;background:var(--c-blue);color:#fff;
  font-size:.82rem;font-weight:700;margin-right:8px;
}

/* ---------- Observation block ---------- */
.observe-block{background:var(--c-teal-soft);border:1px solid #cfe6e4;border-radius:var(--radius-md);padding:24px;margin-bottom:18px;}
.observe-block h3{color:var(--c-blue-dark);}

/* ---------- Diagram box (flow / funnel / timeline) ---------- */
.diagram-box{
  background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-md);
  padding:20px;overflow-x:auto;
}
.diagram-box img{margin:0 auto;}
.diagram-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;}
.diagram-caption{font-size:.82rem;color:var(--c-ink-soft);margin-top:10px;}

/* ---------- Flow chain (HTML based, used inside articles) ---------- */
.flow-chain{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:0;}
.flow-chain li{
  position:relative;padding:10px 14px 10px 30px;border-left:2px solid var(--c-border-strong);
  font-size:.94rem;
}
.flow-chain li::before{
  content:"";position:absolute;left:-7px;top:16px;width:12px;height:12px;border-radius:50%;
  background:var(--c-blue);border:2px solid var(--c-bg-alt);
}
.flow-chain li strong{color:var(--c-blue-dark);}

/* ---------- Definition list style (是什么系列) ---------- */
.term-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.term-item{background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-md);padding:16px 18px;}
.term-item dt{font-weight:700;color:var(--c-blue-dark);margin-bottom:4px;font-size:.98rem;}
.term-item dd{margin:0;color:var(--c-ink-soft);font-size:.9rem;}

/* ---------- Tables (model inventory etc) ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--c-border);border-radius:var(--radius-md);background:var(--c-bg-alt);}
table.data-table{min-width:640px;}
table.data-table th,table.data-table td{
  text-align:left;padding:10px 14px;border-bottom:1px solid var(--c-border);font-size:.88rem;
}
table.data-table th{background:var(--c-bg-soft);color:var(--c-ink-soft);font-weight:700;font-size:.78rem;text-transform:uppercase;letter-spacing:.02em;}
table.data-table tr:last-child td{border-bottom:none;}
.status-pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:.76rem;font-weight:700;}
.status-ok{background:var(--c-green-soft);color:var(--c-green);}
.status-watch{background:var(--c-orange-soft);color:var(--c-orange);}
.status-review{background:var(--c-purple-soft);color:var(--c-purple);}

/* ---------- Interactive widgets ---------- */
.tabs{display:flex;gap:8px;margin-bottom:16px;flex-wrap:wrap;}
.tab-btn{
  padding:8px 16px;border-radius:999px;border:1px solid var(--c-border-strong);background:var(--c-bg-alt);
  font-size:.86rem;cursor:pointer;color:var(--c-ink-soft);font-family:inherit;
}
.tab-btn[aria-selected="true"]{background:var(--c-blue);border-color:var(--c-blue);color:#fff;}
.tab-panel{display:none;}
.tab-panel.is-active{display:block;}

.slider-row{display:flex;align-items:center;gap:14px;margin:14px 0;flex-wrap:wrap;}
.slider-row input[type=range]{flex:1;min-width:160px;}
.slider-readout{font-size:.86rem;color:var(--c-ink-soft);min-width:210px;}

/* ---------- Assistant demo ---------- */
.assistant-demo{background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-lg);padding:22px;}
.assistant-q-list{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px;}
.assistant-q-list button{
  border:1px solid var(--c-border-strong);background:var(--c-bg-soft);border-radius:999px;
  padding:8px 14px;font-size:.84rem;cursor:pointer;color:var(--c-ink);font-family:inherit;
}
.assistant-q-list button:hover{background:var(--c-blue-soft);border-color:var(--c-blue);color:var(--c-blue);}
.assistant-answer{
  background:var(--c-blue-soft);border:1px solid #cddaea;border-radius:var(--radius-md);
  padding:16px 18px;font-size:.92rem;color:var(--c-blue-dark);min-height:64px;
}
.assistant-answer .confidence{display:inline-block;margin-top:10px;font-size:.76rem;font-weight:700;padding:2px 10px;border-radius:999px;}
.confidence-high{background:var(--c-green-soft);color:var(--c-green);}
.confidence-medium{background:var(--c-orange-soft);color:var(--c-orange);}
.confidence-low{background:var(--c-red-soft);color:var(--c-red);}

/* ---------- Permission ladder ---------- */
.permission-ladder{list-style:none;margin:0;padding:0;display:grid;gap:8px;}
.permission-ladder li{
  display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:var(--radius-sm);
  border:1px solid var(--c-border);background:var(--c-bg-alt);font-size:.9rem;
}
.permission-ladder li .step-num{
  width:24px;height:24px;border-radius:50%;background:var(--c-purple);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:.76rem;font-weight:700;flex:none;
}
.permission-ladder li.is-blocked{background:var(--c-red-soft);border-color:#e3c3c1;}
.permission-ladder li.is-blocked .step-num{background:var(--c-red);}
.permission-ladder li .step-note{margin-left:auto;font-size:.76rem;color:var(--c-ink-soft);}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--c-border);}
.faq-item{border-bottom:1px solid var(--c-border);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;padding:16px 4px;
  font-size:.98rem;font-weight:600;color:var(--c-ink);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:12px;font-family:inherit;
}
.faq-q::after{content:"+";font-size:1.3rem;color:var(--c-ink-soft);flex:none;}
.faq-item.is-open .faq-q::after{content:"–";}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:.9rem;color:var(--c-ink-soft);}
.faq-item.is-open .faq-a{max-height:400px;}
.faq-a-inner{padding:0 4px 16px;}

/* ---------- Disclaimer / notice boxes ---------- */
.notice{
  border-radius:var(--radius-md);padding:18px 20px;font-size:.88rem;margin-bottom:14px;
  border:1px solid var(--c-border);background:var(--c-bg-alt);color:var(--c-ink-soft);
}
.notice strong{color:var(--c-ink);}
.notice-warn{background:var(--c-orange-soft);border-color:#ecd6b6;}
.notice-info{background:var(--c-blue-soft);border-color:#cddaea;}

/* ---------- App feature grid ---------- */
.feature-8grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.feature-8grid .item{
  background:var(--c-bg-alt);border:1px solid var(--c-border);border-radius:var(--radius-md);
  padding:16px;text-align:center;
}
.feature-8grid .item img{width:40px;height:40px;margin:0 auto 10px;}
.feature-8grid .item h4{font-size:.88rem;margin:0;}

.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.download-item{
  background:var(--c-bg-alt);border:1px dashed var(--c-border-strong);border-radius:var(--radius-md);
  padding:20px;text-align:center;color:var(--c-ink-soft);font-size:.88rem;
}
.download-item img{width:44px;height:44px;margin:0 auto 10px;}
.download-item .status{display:block;margin-top:8px;font-size:.78rem;color:var(--c-orange);font-weight:700;}

/* ---------- Company / footer ---------- */
.company-block{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start;}

.site-footer{background:var(--c-blue-dark);color:#cfd6e2;padding:44px 0 26px;margin-top:20px;}
.site-footer a{color:#dbe2ee;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;margin-bottom:28px;}
.footer-col h4{color:#fff;font-size:.92rem;margin-bottom:12px;}
.footer-col ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:.86rem;}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;margin-bottom:10px;}
.footer-brand img{width:30px;height:30px;}
.footer-legal{font-size:.78rem;color:#9aa5b8;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;line-height:1.8;}
.footer-icp{margin-top:8px;min-height:1.4em;}

.back-to-top{
  position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;
  background:var(--c-blue);color:#fff;border:none;display:none;align-items:center;justify-content:center;
  cursor:pointer;box-shadow:var(--shadow-2);z-index:80;font-size:1.1rem;
}
.back-to-top.is-visible{display:flex;}

/* ---------- Utility ---------- */
.mt-0{margin-top:0;}
.text-center{text-align:center;}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:24px;}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.gap-lg{gap:34px;}
.small{font-size:.84rem;color:var(--c-ink-soft);}
.divider{height:1px;background:var(--c-border);margin:40px 0;}
.section-links{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px;}
.section-links a{
  border:1px solid var(--c-border-strong);border-radius:999px;padding:8px 16px;font-size:.86rem;
  color:var(--c-ink);background:var(--c-bg-alt);
}
.section-links a:hover{border-color:var(--c-blue);color:var(--c-blue);text-decoration:none;}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width:1024px){
  .article-grid.cols-3{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .feature-8grid{grid-template-columns:repeat(3,1fr);}
}
@media (max-width:900px){
  .main-nav{
    position:fixed;inset:68px 0 0 0;background:var(--c-bg);
    display:none;flex-direction:column;padding:10px 20px 30px;overflow-y:auto;
    border-top:1px solid var(--c-border);
  }
  .main-nav.is-open{display:flex;}
  .main-nav ul{flex-direction:column;gap:2px;}
  .main-nav a{padding:14px 10px;font-size:1rem;border-bottom:1px solid var(--c-border);}
  .nav-toggle{display:flex;}
  .hero .container{grid-template-columns:1fr;}
  .hero-media{order:-1;}
  .company-block{grid-template-columns:1fr;}
}
@media (max-width:768px){
  .article-grid,.article-grid.cols-3{grid-template-columns:1fr;}
  .term-list{grid-template-columns:1fr;}
  .grid-2,.grid-3{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:22px;}
  .feature-8grid{grid-template-columns:repeat(2,1fr);}
  .download-grid{grid-template-columns:1fr;}
  h1{font-size:1.55rem;}
  .hero h1{font-size:1.55rem;}
  h2{font-size:1.3rem;}
  .section{padding:38px 0;}
}
@media (max-width:430px){
  .container{padding:0 16px;}
  .feature-8grid{grid-template-columns:repeat(2,1fr);}
  .footer-grid{grid-template-columns:1fr;}
}

/* ---------- Print (kept minimal) ---------- */
@media print{
  .site-header,.back-to-top,.nav-toggle{display:none;}
}