/* ============ 基础变量（赤焰交易 · 紧凑看板） ============ */
:root{
  --bnb-yellow:#FB7185;
  --bnb-yellow-2:#FDA4AF;
  --bnb-bg:#14080C;
  --bnb-panel:#1F1016;
  --bnb-panel-2:#2A141C;
  --bnb-line:#45202B;
  --bnb-text:#F8EBEF;
  --bnb-muted:#B9919C;
  --bnb-green:#4ADE80;
  --bnb-red:#F43F5E;
  --r:8px;
  --max:1200px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  background:var(--bnb-bg);
  color:var(--bnb-text);
  font-family:"DIN Alternate","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}
section{scroll-margin-top:92px}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:50px;padding:0 28px;border-radius:10px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.2px;cursor:pointer;
  transition:transform .22s ease, box-shadow .22s ease, background .22s ease;
  white-space:nowrap;
}
.btn svg{width:18px;height:18px;flex:none}
.btn-primary{
  background:linear-gradient(135deg,var(--bnb-yellow-2),var(--bnb-yellow));
  color:#1A070C;box-shadow:0 10px 28px rgba(251,113,133,.26);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(251,113,133,.42)}
.btn-ghost{
  background:rgba(251,113,133,.07);color:var(--bnb-yellow);
  border-color:rgba(251,113,133,.36);
}
.btn-ghost:hover{background:rgba(251,113,133,.16);transform:translateY(-2px)}
.btn-sm{height:42px;padding:0 20px;font-size:14px;border-radius:9px}

/* ============ 顶部导航 ============ */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:rgba(11,14,17,.80);
  backdrop-filter:blur(18px) saturate(180%);
  -webkit-backdrop-filter:blur(18px) saturate(180%);
  border-bottom:1px solid rgba(43,49,57,.65);
}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:.3px}
.brand svg,.brand img{width:26px;height:26px;flex:none;object-fit:contain}
.brand span i,.brand .logo-text i{color:var(--bnb-yellow);font-style:normal}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none}
.nav-links a{
  display:block;padding:9px 15px;border-radius:10px;font-size:14.5px;font-weight:500;
  color:#B7BDC6;transition:.2s;
}
.nav-links a:hover,.nav-links a.active{color:var(--bnb-yellow);background:rgba(251,113,133,.09)}
.nav-cta{display:flex;align-items:center;gap:10px}

/* ============ Hero ============ */
.hero{position:relative;padding:100px 0 84px;overflow:hidden;text-align:center}
.hero::before{
  content:"";position:absolute;top:-420px;left:50%;transform:translateX(-50%);
  width:1200px;height:820px;pointer-events:none;
  background:radial-gradient(closest-side,rgba(251,113,133,.20),rgba(251,113,133,.05) 55%,transparent 72%);
}
.hero::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(43,49,57,.28) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(43,49,57,.28) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 50% 32%,#000,transparent 75%);
          mask-image:radial-gradient(ellipse 70% 60% at 50% 32%,#000,transparent 75%);
}
.hero .wrap{position:relative;z-index:1}
.pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 16px;border-radius:999px;font-size:13px;font-weight:500;color:var(--bnb-yellow);
  background:rgba(251,113,133,.09);border:1px solid rgba(251,113,133,.28);
}
.pill .dot{width:7px;height:7px;border-radius:50%;background:var(--bnb-green);box-shadow:0 0 0 4px rgba(14,203,129,.16)}
.hero h1{
  margin:26px auto 0;max-width:900px;
  font-size:clamp(30px,5.2vw,58px);line-height:1.16;font-weight:800;letter-spacing:-.5px;
}
.hero h1 em{
  font-style:normal;
  background:linear-gradient(120deg,var(--bnb-yellow-2),var(--bnb-yellow) 55%,#E8A800);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p.lead{
  margin:22px auto 0;max-width:680px;
  font-size:clamp(15px,1.6vw,17.5px);color:#A7B0BC;
}
.hero-actions{
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:38px;
}
.hero-note{margin-top:18px;font-size:13px;color:var(--bnb-muted)}
.hero-note b{color:var(--bnb-yellow);font-weight:600}

/* ============ 数据条 ============ */
.stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;
  margin-top:64px;background:var(--bnb-line);
  border:1px solid var(--bnb-line);border-radius:var(--r);overflow:hidden;
}
.stat{background:var(--bnb-panel);padding:26px 18px;text-align:center}
.stat b{display:block;font-size:clamp(21px,2.6vw,30px);font-weight:800;color:var(--bnb-yellow);letter-spacing:-.3px}
.stat span{display:block;margin-top:6px;font-size:13px;color:var(--bnb-muted)}

/* ============ 跑马灯（非顶部） ============ */
.ticker{
  position:relative;margin:72px 0 0;
  border-top:1px solid var(--bnb-line);border-bottom:1px solid var(--bnb-line);
  background:linear-gradient(90deg,rgba(251,113,133,.05),rgba(24,26,32,.9),rgba(251,113,133,.05));
  overflow:hidden;
}
.ticker::before,.ticker::after{
  content:"";position:absolute;top:0;bottom:0;width:90px;z-index:2;pointer-events:none;
}
.ticker::before{left:0;background:linear-gradient(90deg,var(--bnb-bg),transparent)}
.ticker::after{right:0;background:linear-gradient(270deg,var(--bnb-bg),transparent)}
.ticker-track{display:flex;width:max-content;animation:marquee 38s linear infinite}
.ticker:hover .ticker-track{animation-play-state:paused}
.ticker-group{display:flex;align-items:center}
.tick{
  display:inline-flex;align-items:center;gap:12px;
  padding:15px 30px;font-size:14px;white-space:nowrap;
  border-right:1px solid rgba(43,49,57,.7);
}
.tick .sym{color:#C6CDD6;font-weight:600;letter-spacing:.2px}
.tick .px{color:#EAECEF;font-variant-numeric:tabular-nums}
.tick .chg{font-weight:600;font-variant-numeric:tabular-nums}
.chg.up{color:var(--bnb-green)}
.chg.down{color:var(--bnb-red)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ============ 通用区块 ============ */
.sec{padding:92px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 54px}
.sec-tag{
  display:inline-block;font-size:12.5px;font-weight:700;letter-spacing:2px;
  color:var(--bnb-yellow);text-transform:uppercase;
}
.sec-head h2{
  margin-top:14px;font-size:clamp(24px,3.4vw,38px);line-height:1.25;
  font-weight:800;letter-spacing:-.4px;
}
.sec-head p{margin-top:14px;color:var(--bnb-muted);font-size:15.5px}

.grid{display:grid;gap:20px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}

.card{
  position:relative;background:var(--bnb-panel);
  border:1px solid var(--bnb-line);border-radius:var(--r);
  padding:30px 26px;transition:.28s ease;overflow:hidden;
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:var(--r);opacity:0;transition:.3s;
  background:radial-gradient(400px circle at 50% 0%,rgba(251,113,133,.13),transparent 65%);
}
.card:hover{transform:translateY(-5px);border-color:rgba(251,113,133,.42);box-shadow:0 22px 50px rgba(0,0,0,.5)}
.card:hover::after{opacity:1}
.card > *{position:relative;z-index:1}
.ico{
  width:46px;height:46px;border-radius:12px;display:grid;place-items:center;
  background:rgba(251,113,133,.10);border:1px solid rgba(251,113,133,.24);margin-bottom:18px;
}
.ico svg{width:22px;height:22px;stroke:var(--bnb-yellow);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.card h3{font-size:17.5px;font-weight:700;margin-bottom:9px}
.card p{font-size:14.5px;color:var(--bnb-muted)}

/* ============ 安全区（浅色反差） ============ */
.sec-alt{background:linear-gradient(180deg,#0B0E11,#101318 45%,#0B0E11)}
.safe-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:8px}
.safe-item{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--bnb-panel-2);border:1px solid var(--bnb-line);
  border-radius:12px;padding:20px 22px;
}
.safe-item .tickmark{
  flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;
  background:rgba(14,203,129,.12);border:1px solid rgba(14,203,129,.35);
}
.safe-item .tickmark svg{width:13px;height:13px;stroke:var(--bnb-green);fill:none;stroke-width:2.6;stroke-linecap:round;stroke-linejoin:round}
.safe-item h4{font-size:15.5px;font-weight:700;margin-bottom:4px}
.safe-item p{font-size:14px;color:var(--bnb-muted)}

/* ============ 下载 CTA ============ */
.cta-box{
  position:relative;overflow:hidden;text-align:center;
  border:1px solid rgba(251,113,133,.30);border-radius:20px;
  padding:64px 32px;
  background:
    radial-gradient(700px circle at 50% -10%,rgba(251,113,133,.16),transparent 62%),
    var(--bnb-panel);
}
.cta-box h2{font-size:clamp(23px,3.2vw,36px);font-weight:800;letter-spacing:-.4px}
.cta-box p{margin:16px auto 0;max-width:600px;color:var(--bnb-muted);font-size:15.5px}
.cta-actions{display:flex;flex-wrap:wrap;justify-content:center;gap:14px;margin-top:34px}
.cta-actions .btn{min-width:190px}

/* ============ 新闻动态 ============ */
.news-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:20px;
}
.news-card{
  display:flex;flex-direction:column;gap:12px;min-height:100%;
  background:var(--bnb-panel);border:1px solid var(--bnb-line);border-radius:var(--r);
  padding:26px 24px;transition:.28s ease;text-decoration:none;color:inherit;
}
.news-card:hover{
  transform:translateY(-5px);border-color:rgba(251,113,133,.42);
  box-shadow:0 22px 50px rgba(0,0,0,.5);color:inherit;
}
.news-card .news-date{
  font-size:12.5px;color:var(--bnb-yellow);font-weight:600;letter-spacing:.3px;
}
.news-card h3{
  font-size:17px;font-weight:700;line-height:1.45;margin:0;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card p{
  margin:0;font-size:14px;color:var(--bnb-muted);line-height:1.7;flex:1;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card .news-more{
  margin-top:6px;font-size:13.5px;font-weight:600;color:var(--bnb-yellow);
}
.news-empty{
  grid-column:1/-1;text-align:center;padding:40px 20px;
  color:var(--bnb-muted);border:1px dashed var(--bnb-line);border-radius:var(--r);
}
.news-actions{display:flex;justify-content:center;margin-top:36px}

/* 文章列表 / 内容页 */
.page-main{padding:48px 0 80px}
.page-hero{
  padding:36px 0 8px;border-bottom:1px solid var(--bnb-line);margin-bottom:28px;
}
.page-hero h1{font-size:clamp(26px,3.2vw,36px);font-weight:800;letter-spacing:-.4px;margin:0}
.page-hero .page-sub{margin-top:12px;color:var(--bnb-muted);font-size:15px}
.crumb{font-size:13.5px;color:var(--bnb-muted);margin-bottom:18px}
.crumb a{color:var(--bnb-muted);transition:.2s}
.crumb a:hover{color:var(--bnb-yellow)}
.article-list-page{display:flex;flex-direction:column;gap:14px}
.article-list-item{
  display:block;padding:22px 24px;border-radius:12px;
  background:var(--bnb-panel);border:1px solid var(--bnb-line);transition:.25s;
}
.article-list-item:hover{border-color:rgba(251,113,133,.36);transform:translateY(-2px)}
.article-list-item h2{font-size:18px;font-weight:700;margin:0 0 8px;line-height:1.4}
.article-list-item .meta{font-size:13px;color:var(--bnb-yellow);margin-bottom:8px}
.article-list-item .sum{font-size:14.5px;color:var(--bnb-muted);line-height:1.7}
.pager{display:flex;gap:14px;align-items:center;justify-content:center;margin-top:34px}
.pager a,.pager span{color:var(--bnb-muted);font-size:14px}
.pager a{padding:8px 14px;border:1px solid var(--bnb-line);border-radius:8px}
.pager a:hover{color:var(--bnb-yellow);border-color:rgba(251,113,133,.4)}
.article-detail{max-width:860px;margin:0 auto}
.article-detail h1{font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.3;margin:0 0 14px}
.article-detail .meta{color:var(--bnb-muted);font-size:14px;margin-bottom:22px}
.article-detail .summary{
  color:#C6CDD6;font-size:15.5px;line-height:1.75;margin-bottom:28px;
  padding:18px 20px;border-left:3px solid var(--bnb-yellow);
  background:rgba(251,113,133,.06);border-radius:0 10px 10px 0;
}
.article-body{line-height:1.85;font-size:1.05rem;color:var(--bnb-text)}
.article-body p{margin:0 0 1.1em}
.article-body img{max-width:100%;height:auto;border-radius:10px}
.article-body h2,.article-body h3{margin:1.4em 0 .7em;font-weight:700}
.article-body a{color:var(--bnb-yellow)}
.article-nav{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;
  margin-top:40px;padding-top:28px;border-top:1px solid var(--bnb-line);
}
.article-nav-prev,
.article-nav-next{min-width:0}
.article-nav a{
  display:flex;flex-direction:column;gap:8px;min-width:0;width:100%;
  padding:18px 20px;border-radius:12px;
  background:var(--bnb-panel);border:1px solid var(--bnb-line);
  color:inherit;text-decoration:none;transition:.22s ease;
}
.article-nav a:hover{
  border-color:rgba(251,113,133,.42);color:var(--bnb-yellow);
  transform:translateY(-2px);
}
.article-nav .label{
  display:flex;align-items:center;gap:6px;
  font-size:13px;font-weight:600;color:var(--bnb-muted);white-space:nowrap;
}
.article-nav a:hover .label{color:var(--bnb-yellow)}
.article-nav strong{
  min-width:0;width:100%;
  font-size:15.5px;font-weight:700;line-height:1.45;
  color:var(--bnb-text);word-break:break-word;overflow-wrap:anywhere;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.article-nav a:hover strong{color:var(--bnb-yellow)}
.article-nav-next a{align-items:flex-end;text-align:right}
.article-nav-next .label{justify-content:flex-end}
.article-nav-empty{
  min-height:1px;
}

/* ============ FAQ ============ */
.faq{max-width:860px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq details{
  background:var(--bnb-panel);border:1px solid var(--bnb-line);
  border-radius:12px;padding:0 22px;transition:.25s;
}
.faq details[open]{border-color:rgba(251,113,133,.36);background:var(--bnb-panel-2)}
.faq summary{
  list-style:none;cursor:pointer;padding:19px 0;font-size:15.5px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--bnb-yellow);
  transition:transform .25s;line-height:1;
}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 0 20px;color:var(--bnb-muted);font-size:14.5px}

/* ============ 页脚 ============ */
.site-footer{border-top:1px solid var(--bnb-line);padding:54px 0 40px;background:#080A0C}
.foot-top{display:flex;flex-wrap:wrap;justify-content:space-between;gap:36px}
.foot-brand{max-width:340px}
.foot-brand .brand{margin-bottom:14px}
.foot-brand p{font-size:13.5px;color:var(--bnb-muted)}
.foot-cols{display:flex;flex-wrap:wrap;gap:64px}
.foot-col h5{font-size:13px;font-weight:700;color:#C6CDD6;margin-bottom:14px;letter-spacing:.4px}
.foot-col ul{list-style:none;display:flex;flex-direction:column;gap:10px}
.foot-col a{font-size:13.5px;color:var(--bnb-muted);transition:.2s}
.foot-col a:hover{color:var(--bnb-yellow)}
.foot-bottom{
  margin-top:44px;padding-top:22px;border-top:1px solid var(--bnb-line);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:14px;
  font-size:12.5px;color:#5E6673;
}

/* ============ 滚动揭示 ============ */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}

/* ============ 响应式 ============ */
@media (max-width:980px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .g3,.news-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
}
@media (max-width:680px){
  .wrap{padding:0 18px}
  .sec{padding:66px 0}
  .hero{padding:70px 0 60px}
  .g3,.g4,.g2,.safe-list,.news-grid{grid-template-columns:1fr}
  .stats{grid-template-columns:repeat(2,1fr)}
  .btn{height:48px;padding:0 22px;font-size:14.5px}
  .hero-actions .btn,.cta-actions .btn{flex:1 1 100%}
  .foot-cols{gap:34px}
  .tick{padding:13px 20px;font-size:13px}
  .article-nav{grid-template-columns:1fr}
  .article-nav-next a{align-items:flex-start;text-align:left}
  .article-nav-next .label{justify-content:flex-start}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ticker-track{animation:none}
  .reveal{opacity:1;transform:none;transition:none}
}


/* ===== layout: board ===== */
.hero-board{text-align:left;padding:56px 0 40px}
.hero-board-bar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px}
.hero-board h1{max-width:none;margin:0}
.hero-board .lead{margin:14px 0 0}
.stats-board{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:28px;background:transparent;border:0}
.stats-board .stat{border:1px solid var(--bnb-line);border-radius:8px;background:var(--bnb-panel);padding:16px;text-align:left}
.feature-dense{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.feature-dense .card{padding:18px 16px}
.feature-dense .card .ico{width:36px;height:36px;margin-bottom:12px}
.feature-dense .card h3{font-size:15px;margin-bottom:6px}
.feature-dense .card p{font-size:13px}
.market-board{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.market-board .card{padding:18px 16px;border-radius:8px}
.news-dense{grid-template-columns:repeat(3,1fr);gap:10px}
.news-dense .news-card{padding:18px 16px;border-radius:8px}
@media (max-width:1100px){
  .feature-dense{grid-template-columns:repeat(3,1fr)}
  .market-board{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:700px){
  .hero-board-bar{flex-direction:column;align-items:flex-start}
  .stats-board,.feature-dense,.market-board,.news-dense{grid-template-columns:1fr}
}