/* coinbier.org — 合约交易台主题 */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:'Helvetica Neue','PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--c1);color:var(--c10);
  line-height:1.65;font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a:hover{color:var(--c7)}
img{max-width:100%;display:block}
:root{
  --c1:#081217;--c2:#0c1a21;--c3:#10242c;
  --c4:rgba(255,255,255,0.03);--c5:rgba(255,255,255,0.07);--c6:rgba(255,255,255,0.14);
  --c7:#22d3ee;--c8:rgba(34,211,238,0.16);--c9:rgba(34,211,238,0.08);
  --c10:#d6e2e8;--c11:#6b8490;--c12:#465c66;
  --c13:10px;--c14:6px;--c15:16px;
  --c16:1100px;--c17:80px;
}
.cc-mono{font-family:Consolas,'Courier New',monospace;font-variant-numeric:tabular-nums}
.cc-up{color:#ef4444}
.cc-down{color:#10b981}
.container{max-width:var(--c16);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{color:#e8f2f6;line-height:1.25;font-weight:800}

/* === NAV === */
.site-nav{
  position:sticky;top:0;z-index:100;height:var(--c17);
  background:rgba(8,18,23,0.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--c5);
}
.site-nav .container{display:flex;align-items:center;justify-content:space-between;height:100%}
.nav-logo{display:inline-flex;align-items:center}
.nav-links{display:flex;list-style:none;gap:28px}
.nav-links a{font-size:0.92rem;color:var(--c11);padding:8px 0;position:relative;white-space:nowrap}
.nav-links a:hover{color:var(--c10)}
.nav-links a.active{color:var(--c7)}
.nav-links a.active::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--c7)}
.nav-cta{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c7);color:#081217;font-weight:700;font-size:0.9rem;
  padding:9px 20px;border-radius:999px;white-space:nowrap;
  min-height:44px;transition:box-shadow .2s,transform .2s;
}
.nav-cta:hover{color:#081217;box-shadow:0 6px 24px var(--c8);transform:translateY(-1px)}
.nav-toggle{display:none;background:none;border:0;color:var(--c10);font-size:1.6rem;cursor:pointer;min-height:44px;min-width:44px}

/* === HERO (contract) === */
.cc-hero{
  padding:80px 0 56px;
  background:
    radial-gradient(ellipse 60% 50% at 78% 0%,rgba(34,211,238,0.08),transparent 60%),
    linear-gradient(180deg,var(--c1) 0%,var(--c2) 100%);
  border-bottom:1px solid var(--c5);
}
.cc-hero-grid{display:grid;grid-template-columns:1.05fr 0.95fr;gap:56px;align-items:center}
.hero-eyebrow{
  display:inline-block;font-size:0.78rem;letter-spacing:0.14em;text-transform:uppercase;
  color:var(--c7);margin-bottom:18px;
}
.hero-title{font-size:clamp(2rem,4.2vw,3.1rem);margin-bottom:20px}
.hero-title span{color:var(--c7)}
.hero-sub{color:var(--c11);font-size:1.02rem;max-width:44ch;margin-bottom:32px}
.hero-ctas{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--c7);color:#081217;font-weight:700;font-size:0.95rem;
  padding:13px 30px;border-radius:999px;white-space:nowrap;
  min-height:44px;transition:box-shadow .2s,transform .2s;
}
.btn-primary:hover{color:#081217;transform:translateY(-2px);box-shadow:0 8px 30px var(--c8)}
.btn-outline{
  display:inline-flex;align-items:center;justify-content:center;
  border:1px solid var(--c6);color:var(--c10);font-weight:600;font-size:0.9rem;
  padding:12px 26px;border-radius:999px;white-space:nowrap;
  min-height:44px;transition:border-color .2s,color .2s;
}
.btn-outline:hover{border-color:var(--c7);color:var(--c7)}

/* 下单台 mockup */
.cc-order{
  background:var(--c3);border:1px solid var(--c6);border-radius:var(--c15);
  padding:22px 24px;box-shadow:0 24px 60px rgba(0,0,0,0.4);
}
.cc-order-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:6px}
.cc-tag{font-size:0.8rem;color:var(--c11);border:1px solid var(--c5);border-radius:999px;padding:3px 10px}
.cc-px{font-size:1.75rem;font-weight:700;color:var(--c10)}
.cc-order-sub{font-size:0.8rem;color:var(--c12);margin-bottom:18px}
.cc-lev{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.cc-lev>span{font-size:0.82rem;color:var(--c11);white-space:nowrap}
.cc-lev-track{flex:1;height:6px;background:var(--c1);border-radius:3px;overflow:hidden}
.cc-lev-track i{display:block;height:100%;background:linear-gradient(90deg,var(--c9),var(--c7));border-radius:3px}
.cc-lev b{font-size:0.95rem}
.cc-side{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:16px}
.cc-side span{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:46px;border-radius:var(--c14);font-weight:700;font-size:0.92rem;
}
.cc-side-long{background:rgba(239,68,68,0.12);color:#ef4444;border:1px solid rgba(239,68,68,0.3)}
.cc-side-short{background:rgba(16,185,129,0.12);color:#10b981;border:1px solid rgba(16,185,129,0.3)}
.cc-mr{border-top:1px solid var(--c5);padding-top:14px;display:flex;flex-direction:column;gap:9px}
.cc-mr-row{display:flex;justify-content:space-between;font-size:0.85rem}
.cc-mr-row span{color:var(--c11)}
.cc-mr-row b{font-weight:600}
.cc-order-foot{font-size:0.72rem;color:var(--c12);margin-top:14px;text-align:right}

/* === SECTION 通用 === */
.section{padding:64px 0}
.section-alt{background:var(--c2);border-top:1px solid var(--c5);border-bottom:1px solid var(--c5)}
.section-header{margin-bottom:36px;max-width:640px}
.section-eyebrow{font-size:0.78rem;letter-spacing:0.14em;text-transform:uppercase;color:var(--c7);margin-bottom:10px}
.section-title{font-size:clamp(1.45rem,2.6vw,1.9rem);margin-bottom:10px}
.section-desc{color:var(--c11);font-size:0.94rem}
.section-more{margin-top:30px}

/* === 资金费率表 (stats) === */
.cc-table-wrap{overflow-x:auto;border:1px solid var(--c5);border-radius:var(--c15);background:var(--c4)}
.cc-fund{width:100%;border-collapse:collapse;min-width:640px}
.cc-fund th{
  text-align:left;font-size:0.78rem;font-weight:600;color:var(--c11);
  padding:13px 18px;border-bottom:1px solid var(--c5);white-space:nowrap;
}
.cc-fund td{padding:12px 18px;border-bottom:1px solid var(--c5);font-size:0.9rem;white-space:nowrap}
.cc-fund tbody tr:last-child td{border-bottom:none}
.cc-fund tbody tr:hover{background:var(--c9)}
.cc-fund .cc-sym{font-weight:700}
.cc-note{font-size:0.8rem;color:var(--c12);margin-top:12px}

/* === 风控三卡 (features) === */
.cc-risk{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.cc-risk-card{
  background:var(--c4);border:1px solid var(--c5);border-radius:var(--c13);
  padding:26px 24px;transition:border-color .2s,transform .2s;
}
.cc-risk-card:hover{border-color:var(--c6);transform:translateY(-3px)}
.cc-risk-card h3{font-size:1.06rem;margin-bottom:10px}
.cc-risk-card p{color:var(--c11);font-size:0.9rem}

/* === 快讯 (news) === */
.cc-news{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.news-card{
  display:flex;gap:16px;background:var(--c4);border:1px solid var(--c5);
  border-radius:var(--c13);padding:16px;align-items:flex-start;
  transition:border-color .2s,transform .2s;
}
.news-card:hover{border-color:var(--c6);transform:translateY(-2px)}
.news-card-img{width:132px;flex-shrink:0;aspect-ratio:16/10;border-radius:var(--c14);overflow:hidden;background:var(--c3)}
.news-card-img img{width:100%;height:100%;object-fit:cover}
.news-card-body{min-width:0}
.news-card-body h3{font-size:0.98rem;margin-bottom:8px;line-height:1.4}
.news-card-desc{color:var(--c11);font-size:0.84rem;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card-date{display:block;margin-top:10px;font-size:0.76rem;color:var(--c12)}

/* === 多空比 + 爆仓 (trust) === */
.cc-struct{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.cc-struct h3{font-size:1.1rem;margin-bottom:16px}
.cc-ls-row,.cc-liq-row{display:flex;align-items:center;gap:12px;margin-bottom:14px;font-size:0.82rem}
.cc-ls-row .cc-sym,.cc-liq-row .cc-rng{width:56px;font-weight:700;white-space:nowrap}
.cc-ls-bar,.cc-liq-bar{flex:1;height:8px;background:var(--c3);border-radius:4px;overflow:hidden}
.cc-ls-fill{display:block;height:100%;background:#ef4444;border-radius:4px}
.cc-liq-fill{display:block;height:100%;border-radius:4px}
.cc-liq-fill.l{background:#ef4444}
.cc-liq-fill.s{background:#10b981}
.cc-ls-row b,.cc-liq-row b{width:88px;text-align:right;font-weight:600;white-space:nowrap}
.cc-liq-row .cc-amt{width:64px;text-align:right;white-space:nowrap}

/* === 教程 (guide) === */
.cc-guide{display:flex;flex-direction:column}
.cc-guide-row{
  display:grid;grid-template-columns:56px 1fr auto;gap:20px;align-items:baseline;
  padding:18px 8px;border-bottom:1px solid var(--c5);
  transition:background .2s;
}
.cc-guide-row:hover{background:var(--c9)}
.cc-guide-row:first-child{border-top:1px solid var(--c5)}
.cc-guide-idx{font-family:Consolas,'Courier New',monospace;font-size:1.05rem;color:var(--c7);font-weight:700}
.cc-guide-row h3{font-size:1rem}
.cc-guide-row p{color:var(--c11);font-size:0.85rem;margin-top:4px}
.cc-guide-row time{font-size:0.8rem;color:var(--c12);white-space:nowrap}

/* === 列表页 === */
.article-list{display:flex;flex-direction:column;border-top:1px solid var(--c5)}
.article-list-item{
  display:flex;justify-content:space-between;gap:24px;align-items:baseline;
  padding:20px 6px;border-bottom:1px solid var(--c5);
}
.article-list-item h3{font-size:1.02rem;margin-bottom:6px}
.article-list-desc{color:var(--c11);font-size:0.88rem;max-width:640px}
.article-list-date{font-size:0.8rem;color:var(--c12);white-space:nowrap}
.pagination{display:flex;gap:8px;margin-top:36px;flex-wrap:wrap}
.pagination a,.pagination .current{
  display:inline-flex;align-items:center;justify-content:center;min-width:44px;min-height:44px;
  padding:0 14px;border:1px solid var(--c5);border-radius:var(--c14);font-size:0.88rem;
}
.pagination .current{background:var(--c7);color:#081217;border-color:var(--c7);font-weight:700}
.pagination a:hover{border-color:var(--c7);color:var(--c7)}

/* === 面包屑 === */
.breadcrumb{padding:14px 0;border-bottom:1px solid var(--c5);font-size:0.82rem}
.breadcrumb ol{display:flex;list-style:none;gap:8px;align-items:center}
.breadcrumb a{color:var(--c11)}
.breadcrumb a:hover{color:var(--c7)}
.breadcrumb .sep{color:var(--c12)}

/* === 文章页 === */
.article-detail{max-width:760px;margin:0 auto}
.article-header{margin-bottom:32px}
.article-header h1{font-size:clamp(1.6rem,3vw,2.2rem);margin-bottom:16px}
.article-meta{display:flex;gap:18px;flex-wrap:wrap;font-size:0.82rem;color:var(--c12)}
.article-body{font-size:1rem;line-height:1.85}
.article-body h2{font-size:1.3rem;margin:34px 0 14px}
.article-body p{margin-bottom:16px;color:#c4d2d8}
.article-body ul{margin:0 0 16px 22px}
.article-body li{margin-bottom:8px;color:#c4d2d8}
.article-footer{margin-top:44px;border-top:1px solid var(--c5);padding-top:26px}
.article-tags{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.article-tag{font-size:0.8rem;color:var(--c11);border:1px solid var(--c5);border-radius:999px;padding:5px 14px}
.related-articles h3{font-size:1rem;margin-bottom:14px}
.related-articles ul{list-style:none}
.related-articles li{padding:9px 0;border-bottom:1px dashed var(--c5)}
.related-articles li:last-child{border-bottom:none}
.related-articles a{color:var(--c11);font-size:0.92rem}
.related-articles a:hover{color:var(--c7)}

/* === 404 === */
.error-page{padding:96px 0;text-align:center}
.error-page h1{font-size:clamp(3.4rem,9vw,6rem);color:var(--c7);margin-bottom:14px}
.error-page>div>p{color:var(--c11);margin-bottom:34px}
.error-links{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* === 风险提示 === */
.risk-warning{
  margin-top:30px;padding:16px 18px;font-size:0.85rem;line-height:1.7;color:var(--c11);
  background:var(--c9);border:1px solid rgba(34,211,238,0.16);border-radius:var(--c14);
}

/* === FOOTER === */
.site-footer{background:var(--c2);border-top:1px solid var(--c5);padding:56px 0 32px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand p{color:var(--c11);font-size:0.88rem;margin-top:16px;max-width:36ch}
.footer-col h4{font-size:0.95rem;margin-bottom:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{color:var(--c11);font-size:0.88rem}
.footer-col a:hover{color:var(--c7)}
.footer-bottom{
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  border-top:1px solid var(--c5);padding-top:22px;font-size:0.8rem;color:var(--c12);
}
.footer-bottom a{color:var(--c12)}
.footer-bottom a:hover{color:var(--c7)}

/* === 渐显 === */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s ease}
.reveal.visible{opacity:1;transform:none}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .btn-primary,.btn-outline,.nav-cta,.news-card,.cc-risk-card,.cc-guide-row{transition:none}
}

/* === 响应式 === */
@media (max-width:900px){
  .cc-hero-grid{grid-template-columns:1fr;gap:40px}
  .cc-struct{grid-template-columns:1fr;gap:36px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .nav-links{
    display:none;position:absolute;top:var(--c17);left:0;right:0;
    background:var(--c2);flex-direction:column;gap:0;padding:10px 20px 18px;
    border-bottom:1px solid var(--c5);
  }
  .nav-links.open{display:flex}
  .nav-links li{width:100%}
  .nav-links a{display:block;padding:13px 0;border-bottom:1px solid var(--c5);width:100%}
  .nav-links li:last-child a{border-bottom:none}
  .nav-toggle{display:inline-flex;align-items:center;justify-content:center}
}
@media (max-width:640px){
  .cc-news{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .news-card{flex-direction:column}
  .news-card-img{width:100%}
  .cc-guide-row{grid-template-columns:36px 1fr;gap:12px}
  .cc-guide-row time{grid-column:2}
  .article-list-item{flex-direction:column;gap:8px}
}