/* 币汇通 · 1 号站模板 v3(黑白极简交易所风) · 2026-09-23
   类名前缀 bh- · 单文件 · 无外链字体/CSS/JS
   彩色只用于行情涨跌(--bh-up / --bh-down)与对勾图标 */

:root{
  --bh-bg:#000000;
  --bh-bg2:#0a0a0a;
  --bh-card:#121212;
  --bh-card2:#0d0d0d;
  --bh-line:#262626;
  --bh-line2:#3a3a3a;
  --bh-acc:#ffffff;
  --bh-acc-d:#e6e6e6;
  --bh-txt:#d4d4d4;
  --bh-dim:#a3a3a3;
  --bh-weak:#6b6b6b;
  --bh-hi:#ffffff;
  --bh-up:#1fd07a;
  --bh-down:#ff4d4f;
  --bh-warn:#e0b45a;
  --bh-r:12px;
  --bh-r-s:8px;
  --bh-sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
  --bh-mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,"DejaVu Sans Mono",monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bh-bg);color:var(--bh-txt);
  font-family:var(--bh-sans);font-size:15.5px;line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto}
a{color:var(--bh-hi);text-decoration:none}
a:hover{color:var(--bh-acc-d)}
h1,h2,h3,h4{color:var(--bh-hi);line-height:1.2;margin:0 0 12px;letter-spacing:-.02em;font-weight:700}
p{margin:0 0 14px}
ul,ol{margin:0 0 14px;padding-left:1.2em}
li{margin:0 0 6px}
strong{color:var(--bh-hi)}
code,kbd{font-family:var(--bh-mono);font-variant-numeric:tabular-nums}
.bh-wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- 顶部导航 ---------- */
.bh-top{
  position:sticky;top:0;z-index:60;
  background:rgba(0,0,0,.86);backdrop-filter:saturate(120%) blur(12px);
  border-bottom:1px solid var(--bh-line);
}
.bh-top-in{display:flex;align-items:center;gap:16px;height:60px}
.bh-logo{display:flex;align-items:center;gap:9px;color:var(--bh-hi);font-weight:700;font-size:18px;letter-spacing:-.01em;flex:0 0 auto}
.bh-logo:hover{color:var(--bh-hi)}
.bh-logo svg{display:block}
.bh-logo span.bh-logo-sub{font-size:11px;color:var(--bh-weak);font-weight:400;letter-spacing:1.2px;border-left:1px solid var(--bh-line2);padding-left:9px;margin-left:2px}
.bh-menu{display:flex;align-items:center;gap:18px;margin-left:auto}
.bh-menu a{color:var(--bh-dim);font-size:13.5px;white-space:nowrap;padding:6px 0;border-bottom:2px solid transparent}
.bh-menu a:hover{color:var(--bh-hi)}
.bh-menu a.is-cur{color:var(--bh-hi);border-bottom-color:var(--bh-hi)}
.bh-top-act{display:flex;align-items:center;gap:10px;flex:0 0 auto}
.bh-pill{
  display:inline-flex;align-items:center;gap:7px;height:32px;padding:0 12px;
  border:1px solid var(--bh-line2);border-radius:999px;background:var(--bh-card);
  font-size:12.5px;color:var(--bh-dim);white-space:nowrap;
}
.bh-pill b{font-family:var(--bh-mono);color:var(--bh-hi);letter-spacing:1.5px;font-size:13px}
.bh-burger{display:none;width:38px;height:32px;border:1px solid var(--bh-line2);border-radius:8px;background:var(--bh-card);cursor:pointer;padding:0}
.bh-burger i{display:block;width:16px;height:2px;margin:3px auto;background:var(--bh-hi);border-radius:2px}

.bh-btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:38px;padding:0 18px;border-radius:var(--bh-r-s);
  background:var(--bh-acc);color:#000;font-weight:600;font-size:14px;
  border:1px solid var(--bh-acc);white-space:nowrap;cursor:pointer;
  transition:background .15s,border-color .15s;
}
.bh-btn:hover{background:var(--bh-acc-d);border-color:var(--bh-acc-d);color:#000}
.bh-btn-lg{height:50px;padding:0 28px;font-size:16px;border-radius:10px}
.bh-btn-ghost{background:transparent;color:var(--bh-hi);border:1px solid var(--bh-line2)}
.bh-btn-ghost:hover{background:var(--bh-card);border-color:var(--bh-hi);color:var(--bh-hi)}

/* ---------- 首屏 ---------- */
.bh-hero{position:relative;overflow:hidden;border-bottom:1px solid var(--bh-line);background:var(--bh-bg)}
.bh-hero-in{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);gap:44px;padding:44px 0 44px;align-items:start}
.bh-badge{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:16px;
  padding:5px 12px;border-radius:999px;font-size:12.5px;
  background:var(--bh-card);border:1px solid var(--bh-line2);color:var(--bh-dim);
}
.bh-badge i{width:6px;height:6px;border-radius:50%;background:var(--bh-up);display:block}
.bh-h1{font-size:46px;line-height:1.14;letter-spacing:-.03em;margin:0 0 14px;color:var(--bh-hi)}
.bh-h1 em{display:block;font-style:normal;color:var(--bh-dim);font-size:.72em;letter-spacing:-.02em;margin-top:6px}
.bh-lead{font-size:15px;color:var(--bh-dim);max-width:40em;margin:0 0 18px;line-height:1.7}
.bh-lead b{color:var(--bh-hi);font-weight:600}
.bh-tags{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin:18px 0 0;font-size:12.5px;color:var(--bh-weak);list-style:none;padding:0}
.bh-tags li{margin:0}
.bh-tags li:not(.bh-tags-h){padding:3px 10px;border:1px solid var(--bh-line);border-radius:6px;background:var(--bh-card2);color:var(--bh-weak)}
.bh-tags-h{color:var(--bh-weak)}
.bh-hero-btns{display:flex;flex-wrap:wrap;gap:12px;margin:16px 0 0}

/* 邀请码卡(首屏左列,紧凑) */
.bh-codecard{position:relative;max-width:460px}
.bh-codecard .bh-cc-h{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  font-size:12.5px;color:var(--bh-dim);font-weight:500;margin:0 0 8px;letter-spacing:.2px;
}
.bh-cc-tag{
  font-size:11px;letter-spacing:.3px;background:var(--bh-card);border:1px solid var(--bh-line2);
  color:var(--bh-dim);font-weight:600;padding:2px 9px;border-radius:999px;
}
.bh-codebox{
  display:flex;align-items:center;gap:10px;
  background:var(--bh-card);border:1px dashed var(--bh-line2);border-radius:10px;
  padding:9px 10px 9px 16px;
}
.bh-code{
  font-family:var(--bh-mono);font-size:30px;font-weight:700;letter-spacing:4px;
  color:var(--bh-hi);cursor:pointer;flex:1 1 auto;line-height:1.25;
  background:none;border:0;padding:0;text-align:left;
}
.bh-copy{flex:0 0 auto;height:40px;padding:0 18px;min-width:86px}
.bh-copy.is-done{background:var(--bh-card2);border-color:var(--bh-line2);color:var(--bh-hi)}

/* 首屏四条对勾(两列) */
.bh-checks{list-style:none;margin:20px 0 0;padding:0;font-size:13.5px;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px 18px}
.bh-checks li{display:block;position:relative;padding-left:24px;margin:0;color:var(--bh-txt);line-height:1.5}
.bh-checks li::before{
  content:"";position:absolute;left:0;top:2px;width:15px;height:15px;border-radius:4px;
  background:rgba(31,208,122,.12);border:1px solid rgba(31,208,122,.5);
  background-image:linear-gradient(45deg,transparent 46%,var(--bh-up) 46%,var(--bh-up) 56%,transparent 56%);
}
.bh-checks b{color:var(--bh-hi);font-family:var(--bh-mono)}

/* 首屏右栏:实时行情卡 */
.bh-hero-r{display:flex;flex-direction:column;gap:14px}
.bh-mktcard{background:var(--bh-card);border:1px solid var(--bh-line);border-radius:14px;padding:6px 18px 14px}
.bh-mktcard-h{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 0 10px;border-bottom:1px solid var(--bh-line)}
.bh-mktcard-t{display:inline-flex;align-items:center;gap:8px;font-size:13.5px;font-weight:600;color:var(--bh-hi)}
.bh-mktcard-t i{width:7px;height:7px;border-radius:50%;background:var(--bh-up);display:block;box-shadow:0 0 0 3px rgba(31,208,122,.16)}
.bh-mktcard-s{font-family:var(--bh-mono);font-size:11.5px;color:var(--bh-weak)}
.bh-mktlist{list-style:none;margin:0;padding:0}
.bh-mktlist li{
  display:grid;grid-template-columns:32px minmax(0,1fr) auto 74px;align-items:center;gap:12px;
  padding:11px 0;border-bottom:1px solid var(--bh-line);
}
.bh-mktlist li:last-child{border-bottom:0;padding-bottom:4px}
.bh-mkt-ico{
  width:32px;height:32px;border-radius:50%;background:var(--bh-bg);border:1px solid var(--bh-line2);
  display:flex;align-items:center;justify-content:center;font-family:var(--bh-mono);font-size:9.5px;color:var(--bh-dim);
}
.bh-mkt-n{font-size:14.5px;font-weight:600;color:var(--bh-hi);line-height:1.25}
.bh-mkt-n small{display:block;font-weight:400;font-size:11.5px;color:var(--bh-weak);font-family:var(--bh-mono);margin-top:2px}
.bh-mkt-p{font-family:var(--bh-mono);font-size:15px;color:var(--bh-hi);text-align:right;font-variant-numeric:tabular-nums}
.bh-mkt-c{font-family:var(--bh-mono);font-size:13.5px;text-align:right;color:var(--bh-dim);font-variant-numeric:tabular-nums}
.bh-mkt-c.is-up{color:var(--bh-up)}
.bh-mkt-c.is-down{color:var(--bh-down)}
.bh-mktcard-f{font-size:11.5px;color:var(--bh-weak);margin:12px 0 0;line-height:1.6}

.bh-qr{display:flex;align-items:center;gap:14px;background:var(--bh-card);border:1px solid var(--bh-line);border-radius:14px;padding:14px 18px}
.bh-qr-box{
  flex:0 0 auto;width:78px;height:78px;border-radius:8px;
  border:1px dashed var(--bh-line2);background:repeating-linear-gradient(45deg,#141414 0 7px,#0f0f0f 7px 14px);
  display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:10px;color:var(--bh-weak);line-height:1.5;padding:6px;
}
.bh-qr-txt{font-size:12.5px;color:var(--bh-dim);line-height:1.6}
.bh-qr-txt b{display:block;color:var(--bh-hi);font-size:14px;margin-bottom:3px}

/* ---------- 通用区块 ---------- */
.bh-sec{padding:52px 0;border-bottom:1px solid var(--bh-line)}
.bh-sec-alt{background:var(--bh-bg2)}
.bh-eyebrow{
  font-family:var(--bh-mono);font-size:11px;letter-spacing:3px;color:var(--bh-weak);
  text-transform:uppercase;margin:0 0 8px;display:flex;align-items:center;gap:10px;
}
.bh-eyebrow::after{content:"";height:1px;flex:1 1 auto;background:linear-gradient(90deg,var(--bh-line),transparent)}
.bh-h2{font-size:34px;margin:0 0 8px}
.bh-sub{color:var(--bh-dim);font-size:14.5px;margin:0 0 22px;max-width:56em}

.bh-grid{display:grid;gap:14px}
.bh-g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.bh-g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.bh-g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.bh-g5{grid-template-columns:repeat(5,minmax(0,1fr))}

.bh-card{
  background:var(--bh-card);border:1px solid var(--bh-line);border-radius:var(--bh-r);
  padding:20px;transition:border-color .15s;
}
.bh-card:hover{border-color:var(--bh-line2)}
.bh-card h3{font-size:16.5px;margin:0 0 6px}
.bh-card p{font-size:14px;color:var(--bh-dim);margin:0}

/* 权益卡(带大数字) */
.bh-priv{position:relative;overflow:hidden}
.bh-priv .bh-big{
  display:block;font-family:var(--bh-mono);font-size:34px;font-weight:700;
  color:var(--bh-hi);line-height:1.1;margin:0 0 6px;letter-spacing:-1px;
}
.bh-priv .bh-big i{font-style:normal;font-size:16px;color:var(--bh-dim);margin-left:4px}
.bh-priv-no{position:absolute;right:14px;top:8px;font-family:var(--bh-mono);font-size:28px;color:#2e2e2e;font-weight:700}

/* ---------- 计算器 ---------- */
.bh-calc{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:16px;align-items:stretch}
.bh-calc-in{background:var(--bh-card);border:1px solid var(--bh-line);border-radius:var(--bh-r);padding:20px}
.bh-field{margin-bottom:12px}
.bh-field label{display:block;font-size:13px;color:var(--bh-dim);margin-bottom:6px}
.bh-input{
  width:100%;height:44px;padding:0 14px;font-family:var(--bh-mono);font-size:17px;
  color:var(--bh-hi);background:var(--bh-bg);border:1px solid var(--bh-line2);
  border-radius:var(--bh-r-s);outline:none;
}
.bh-input:focus{border-color:var(--bh-hi)}
.bh-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.bh-chip{
  padding:5px 12px;font-family:var(--bh-mono);font-size:12.5px;color:var(--bh-txt);
  background:var(--bh-bg);border:1px solid var(--bh-line2);border-radius:999px;cursor:pointer;
}
.bh-chip:hover{border-color:var(--bh-hi);color:var(--bh-hi)}
.bh-calc-note{font-size:12.5px;color:var(--bh-weak);margin:12px 0 0;line-height:1.7}

.bh-result{background:var(--bh-card);border:1px solid var(--bh-line2);border-radius:var(--bh-r);padding:20px}
.bh-result-lab{font-size:13px;color:var(--bh-dim);margin:0 0 4px}
.bh-result-big{
  font-family:var(--bh-mono);font-size:52px;font-weight:700;color:var(--bh-hi);
  line-height:1.05;letter-spacing:-2px;margin:0 0 4px;word-break:break-all;
}
.bh-result-big small{font-size:18px;color:var(--bh-dim);margin-left:6px;letter-spacing:0}
.bh-result-sub{font-size:13px;color:var(--bh-dim);margin:0 0 16px}
.bh-bars{margin:0;padding:0;list-style:none}
.bh-bar{margin:0 0 12px}
.bh-bar-h{display:flex;justify-content:space-between;font-size:13px;margin-bottom:6px}
.bh-bar-h span{color:var(--bh-dim)}
.bh-bar-h b{font-family:var(--bh-mono);color:var(--bh-hi)}
.bh-bar-t{height:10px;border-radius:999px;background:#1a1a1a;overflow:hidden;border:1px solid var(--bh-line)}
.bh-bar-f{height:100%;border-radius:999px;background:#3a3a3a;transition:width .4s ease}
.bh-bar-f.is-green{background:var(--bh-hi)}
.bh-result-foot{border-top:1px solid var(--bh-line);margin-top:4px;padding-top:12px;font-size:13px;color:var(--bh-dim)}
.bh-result-foot b{color:var(--bh-hi);font-family:var(--bh-mono)}

/* ---------- 步骤 ---------- */
.bh-steps{counter-reset:bhs;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.bh-step{background:var(--bh-card);border:1px solid var(--bh-line);border-radius:var(--bh-r);padding:18px;position:relative}
.bh-step::before{
  counter-increment:bhs;content:"STEP 0" counter(bhs);
  font-family:var(--bh-mono);font-size:11px;letter-spacing:2px;color:var(--bh-weak);
  display:block;margin-bottom:8px;
}
.bh-step h3{font-size:16px;margin:0 0 6px}
.bh-step p{font-size:13.5px;color:var(--bh-dim);margin:0 0 12px}
.bh-shot{
  border:1px dashed var(--bh-line2);border-radius:8px;background:var(--bh-bg);
  min-height:96px;display:flex;align-items:center;justify-content:center;text-align:center;
  font-size:12px;color:var(--bh-weak);line-height:1.6;padding:10px;
}

/* ---------- 下载 ---------- */
.bh-dl{display:block;text-align:center;color:var(--bh-txt)}
.bh-dl:hover{color:var(--bh-txt)}
.bh-dl .bh-dl-ico{
  width:44px;height:44px;margin:0 auto 10px;border-radius:10px;
  background:var(--bh-bg);border:1px solid var(--bh-line2);
  display:flex;align-items:center;justify-content:center;
}
.bh-dl h3{font-size:15.5px;margin:0 0 4px}
.bh-dl p{font-size:12.5px;color:var(--bh-dim);margin:0 0 10px;min-height:40px}
.bh-dl .bh-dl-go{font-size:13px;color:var(--bh-hi);font-weight:600}
.bh-tip{
  display:flex;gap:10px;align-items:flex-start;margin-top:16px;padding:12px 16px;
  border-radius:var(--bh-r-s);border:1px solid rgba(224,180,90,.3);
  background:rgba(224,180,90,.06);color:#d9cdb3;font-size:13.5px;
}
.bh-tip b{color:var(--bh-warn)}

/* ---------- 优势 / 安全 ---------- */
.bh-why{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
.bh-why-i{display:flex;gap:14px;background:var(--bh-card);border:1px solid var(--bh-line);border-radius:var(--bh-r);padding:18px}
.bh-why-n{
  flex:0 0 auto;width:34px;height:34px;border-radius:8px;background:var(--bh-bg);
  border:1px solid var(--bh-line2);color:var(--bh-hi);font-family:var(--bh-mono);
  font-weight:700;display:flex;align-items:center;justify-content:center;font-size:13px;
}
.bh-why-i h3{font-size:16px;margin:0 0 4px}
.bh-why-i p{font-size:13.5px;color:var(--bh-dim);margin:0}
.bh-safe{border-left:2px solid var(--bh-hi);background:var(--bh-card);border-radius:0 var(--bh-r) var(--bh-r) 0;padding:16px 18px}
.bh-safe h3{font-size:16px;margin:0 0 4px}
.bh-safe p{font-size:14px;color:var(--bh-dim);margin:0}

/* ---------- FAQ ---------- */
.bh-faq{border-top:1px solid var(--bh-line)}
.bh-faq-i{border-bottom:1px solid var(--bh-line)}
.bh-faq-q{
  width:100%;text-align:left;background:none;border:0;cursor:pointer;
  display:flex;gap:14px;align-items:center;justify-content:space-between;
  padding:16px 2px;color:var(--bh-hi);font-size:16px;font-family:inherit;font-weight:600;
}
.bh-faq-q:hover{color:var(--bh-acc-d)}
.bh-faq-q .bh-pm{flex:0 0 auto;width:24px;height:24px;border-radius:6px;border:1px solid var(--bh-line2);position:relative;transition:background .15s}
.bh-faq-q .bh-pm::before,.bh-faq-q .bh-pm::after{content:"";position:absolute;left:50%;top:50%;background:var(--bh-hi);border-radius:2px;transform:translate(-50%,-50%)}
.bh-faq-q .bh-pm::before{width:11px;height:2px}
.bh-faq-q .bh-pm::after{width:2px;height:11px;transition:transform .2s}
.bh-faq-i.is-open .bh-pm{background:var(--bh-card)}
.bh-faq-i.is-open .bh-pm::after{transform:translate(-50%,-50%) scaleY(0)}
.bh-faq-a{display:none;padding:0 40px 16px 2px;font-size:14.5px;color:var(--bh-dim)}
.bh-faq-a p{margin:0 0 8px}
.bh-faq-a p:last-child{margin:0}
.bh-faq-i.is-open .bh-faq-a{display:block}

/* ---------- 底部 CTA ---------- */
.bh-cta{text-align:center;padding:56px 0;background:var(--bh-bg2);border-bottom:1px solid var(--bh-line)}
.bh-cta h2{font-size:34px;margin:0 0 10px}
.bh-cta p{color:var(--bh-dim);max-width:40em;margin:0 auto 20px}
.bh-cta-code{
  display:inline-flex;align-items:center;gap:10px;margin-bottom:20px;padding:8px 16px;
  border:1px dashed var(--bh-line2);border-radius:999px;background:var(--bh-card);
  font-size:13.5px;color:var(--bh-dim);
}
.bh-cta-code b{font-family:var(--bh-mono);font-size:18px;color:var(--bh-hi);letter-spacing:4px}
.bh-cta-btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.bh-foot{background:var(--bh-bg);padding:40px 0 26px;font-size:13.5px}
.bh-foot-g{display:grid;grid-template-columns:minmax(0,1.5fr) repeat(2,minmax(0,1fr));gap:30px}
.bh-foot h4{font-size:13.5px;color:var(--bh-hi);margin:0 0 12px;letter-spacing:.3px}
.bh-foot p{color:var(--bh-dim);font-size:13px}
.bh-foot ul{list-style:none;margin:0;padding:0}
.bh-foot li{margin:0 0 8px}
.bh-foot li a{color:var(--bh-dim);font-size:13px}
.bh-foot li a:hover{color:var(--bh-hi)}
.bh-foot-legal{margin-top:28px;padding-top:18px;border-top:1px solid var(--bh-line);color:var(--bh-weak);font-size:12.5px;line-height:1.8}
.bh-foot-legal p{margin:0 0 4px;color:var(--bh-weak);font-size:12.5px}

/* ---------- 内页 ---------- */
.bh-crumb{font-size:13px;color:var(--bh-weak);padding:16px 0 0}
.bh-crumb a{color:var(--bh-weak)}
.bh-crumb a:hover{color:var(--bh-hi)}
.bh-phead{padding:18px 0 26px;border-bottom:1px solid var(--bh-line)}
.bh-phead h1{font-size:36px;margin:0 0 10px}
.bh-phead .bh-lead{margin:0}
.bh-meta{display:flex;flex-wrap:wrap;gap:8px 18px;margin:12px 0 0;padding:0;list-style:none;font-size:12.5px;color:var(--bh-weak)}
.bh-meta li{margin:0}
.bh-page{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:36px;padding:30px 0 52px;align-items:start}
.bh-body h2{font-size:24px;margin:30px 0 10px;padding-left:12px;border-left:2px solid var(--bh-hi)}
.bh-body h2:first-child{margin-top:0}
.bh-body h3{font-size:17px;margin:20px 0 8px}
.bh-body p,.bh-body li{font-size:15px}
.bh-body .bh-shot{margin:14px 0 20px;min-height:150px}
.bh-side{position:sticky;top:76px;display:flex;flex-direction:column;gap:14px}
.bh-side-card{background:var(--bh-card);border:1px solid var(--bh-line);border-radius:var(--bh-r);padding:16px}
.bh-side-card h4{font-size:13px;color:var(--bh-dim);font-weight:500;margin:0 0 10px}
.bh-side-code{
  display:block;width:100%;font-family:var(--bh-mono);font-size:26px;font-weight:700;
  letter-spacing:4px;color:var(--bh-hi);background:var(--bh-bg);border:1px dashed var(--bh-line2);
  border-radius:8px;padding:12px;text-align:center;margin-bottom:10px;cursor:pointer;
}
.bh-side-card .bh-btn{width:100%}
.bh-side-list{list-style:none;margin:0;padding:0}
.bh-side-list li{margin:0 0 8px;font-size:14px}
.bh-side-list a{color:var(--bh-dim)}
.bh-side-list a:hover{color:var(--bh-hi)}
.bh-side-list li.is-cur a{color:var(--bh-hi)}
.bh-table{width:100%;border-collapse:collapse;margin:0 0 20px;font-size:14px}
.bh-table th,.bh-table td{border:1px solid var(--bh-line);padding:10px 12px;text-align:left}
.bh-table th{background:var(--bh-card);color:var(--bh-hi);font-weight:600;font-size:13.5px}
.bh-table td{color:var(--bh-dim)}
.bh-table td b{color:var(--bh-hi);font-family:var(--bh-mono)}
.bh-callout{
  background:var(--bh-card);border:1px solid var(--bh-line);border-left:2px solid var(--bh-hi);
  border-radius:0 var(--bh-r-s) var(--bh-r-s) 0;padding:14px 16px;margin:0 0 20px;font-size:14px;color:var(--bh-dim);
}
.bh-callout b{color:var(--bh-hi)}

/* ---------- 响应式 ---------- */
@media (max-width:1000px){
  .bh-hero-in{grid-template-columns:1fr;gap:24px;padding:36px 0 36px}
  .bh-h1{font-size:38px}
  .bh-codecard{max-width:none}
  .bh-calc{grid-template-columns:1fr}
  .bh-steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bh-g4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .bh-g5{grid-template-columns:repeat(3,minmax(0,1fr))}
  .bh-page{grid-template-columns:1fr;gap:24px}
  .bh-side{position:static}
}
@media (max-width:900px){
  .bh-pill{display:none}
  .bh-menu{gap:14px}
  .bh-menu a{font-size:13px}
}
@media (max-width:720px){
  .bh-burger{display:block}
  .bh-menu{
    display:none;position:absolute;left:0;right:0;top:60px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--bh-bg);border-bottom:1px solid var(--bh-line);padding:6px 24px 12px;
  }
  .bh-menu.is-open{display:flex}
  .bh-menu a{padding:12px 0;border-bottom:1px solid var(--bh-line)}
  .bh-menu a.is-cur{border-bottom-color:var(--bh-line)}
  .bh-top-in{position:relative}
}
@media (max-width:640px){
  body{font-size:15px}
  .bh-sec{padding:40px 0}
  .bh-h1{font-size:30px}
  .bh-h2{font-size:26px}
  .bh-cta h2{font-size:26px}
  .bh-g2,.bh-g3,.bh-g4,.bh-g5,.bh-steps,.bh-why{grid-template-columns:1fr}
  .bh-foot-g{grid-template-columns:1fr;gap:22px}
  .bh-code{font-size:26px;letter-spacing:4px}
  .bh-result-big{font-size:40px}
  .bh-hero-btns .bh-btn{width:100%}
  .bh-cta-btns .bh-btn{width:100%}
  .bh-logo span.bh-logo-sub{display:none}
  .bh-phead h1{font-size:26px}
  .bh-qr{align-items:flex-start}
  .bh-checks{grid-template-columns:1fr;gap:8px}
  .bh-mktlist li{grid-template-columns:30px minmax(0,1fr) auto 66px;gap:9px}
  .bh-mkt-p{font-size:14px}
  .bh-mkt-c{font-size:12.5px}
  .bh-mktcard{padding:4px 14px 12px}
}

/* 内容阶段草稿提示 */
.bh-draft-banner{padding:8px 20px;text-align:center;background:#171717;border-bottom:1px solid var(--bh-line);color:var(--bh-dim);font-size:12px;letter-spacing:.03em}

/* 真实截图（占位替换后） */
.bh-shot.bh-shot-img{display:block;min-height:0;padding:0;margin-left:0;margin-right:0;border-style:solid;border-color:var(--bh-line);background:var(--bh-card2);overflow:hidden;text-align:left}
.bh-shot-img img{display:block;width:auto;max-width:100%;height:auto;margin:0 auto}
.bh-shot-img figcaption{padding:8px 12px;font-size:12px;line-height:1.5;color:var(--bh-dim);border-top:1px solid var(--bh-line)}

/* 扫码卡：真实二维码 */
.bh-qr-box img{display:block;width:100%;height:auto;max-width:240px;margin:0 auto;border-radius:6px;background:#fff;padding:6px;box-sizing:border-box}

/* Independent OK monogram. */
.site-brand-mark{display:inline-block;width:36px;height:36px;max-width:none;vertical-align:middle;object-fit:contain;flex:0 0 auto}.brand-footer-mark{display:block;width:42px;height:42px;margin-bottom:16px}

/* ---------- 吸底邀请码条(首页与五个内页共用) · 2026-09-27 ----------
   反色整条贴底;首页首屏按钮在视口内时由 app.js 收起,无 JS 时一直显示 */
.bh-dock-gap{height:56px}
.bh-dock{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  background:#fff;color:#000;padding-bottom:env(safe-area-inset-bottom);
  box-shadow:0 -6px 24px rgba(0,0,0,.5);
  transition:transform .25s ease,visibility .25s;
}
.bh-dock.is-away{transform:translateY(105%);visibility:hidden}
.bh-dock-in{display:flex;align-items:center;gap:14px;height:56px}
.bh-dock-txt{margin:0;flex:1;min-width:0;font-size:14px;color:#1a1a1a;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.bh-dock-txt b,.bh-dock-code b{font-family:var(--bh-mono);letter-spacing:.06em;color:#000}
.bh-dock-code{display:none}
.bh-dock-copy{
  height:36px;padding:0 14px;border:1px solid #000;background:#fff;color:#000;
  border-radius:var(--bh-r-s);font:inherit;font-size:13px;cursor:pointer;flex:0 0 auto;
}
.bh-dock-copy:hover{background:#f0f0f0}
.bh-dock-copy.is-done{background:#000;color:#fff}
.bh-dock-go{
  display:inline-flex;align-items:center;height:36px;padding:0 18px;flex:0 0 auto;
  background:#000;color:#fff;border-radius:var(--bh-r-s);font-size:13.5px;font-weight:600;white-space:nowrap;
}
.bh-dock-go:hover{background:#262626;color:#fff}
@media (max-width:780px){
  .bh-dock-in{gap:10px;padding:0 14px}
  .bh-dock-txt{display:none}
  .bh-dock-code{display:block;flex:1;min-width:0;font-size:13px;color:#333;white-space:nowrap;overflow:hidden}
  .bh-dock-code b{font-size:15px}
}
@media (prefers-reduced-motion:reduce){.bh-dock{transition:none}}