:root{
  --bnb:#F0B90B; --bnb-dark:#C99400; --ink:#181A20; --ink-2:#1E2329;
  --text:#333; --sub:#707A8A; --bg:#FAFAFA; --card:#FFF; --line:#EAECEF;
  --ok:#0ECB81; --warn:#F6465D;
}
*{margin:0;padding:0;box-sizing:border-box;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
body{background:var(--bg);color:var(--text);line-height:1.6}
html{scroll-behavior:smooth}
section[id],div[id]{scroll-margin-top:70px}
a{text-decoration:none;color:inherit;transition:.2s}
img{max-width:100%}
.container{max-width:1080px;margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;border-radius:8px;cursor:pointer;border:none}
.btn-primary{background:var(--bnb);color:var(--ink);padding:14px 28px;font-size:16px}
.btn-primary:hover{background:var(--bnb-dark)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink-2);padding:12px 24px}
.btn-ghost:hover{border-color:var(--bnb)}

/* 头部 */
header{background:var(--ink);position:sticky;top:0;z-index:50}
.nav{display:flex;justify-content:space-between;align-items:center;height:60px}
.logo{display:flex;align-items:center;gap:8px;color:#fff;font-weight:800;font-size:18px;white-space:nowrap}
.logo .b{color:var(--bnb)}
.badge{font-size:11px;background:rgba(240,185,11,.15);color:var(--bnb);padding:3px 8px;border-radius:20px;font-weight:600}
.nav-links{display:flex;gap:24px;font-size:14px;color:#EAECEF}
.nav-links a:hover{color:var(--bnb)}
.nav .btn-primary{padding:8px 18px;font-size:14px}

/* Hero */
.hero{background:linear-gradient(135deg,#181A20 0%,#1E2329 100%);color:#fff;padding:56px 0}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero h1{font-size:34px;line-height:1.3;margin-bottom:16px}
.hero h1 span{color:var(--bnb)}
.hero p.lead{color:#B7BDC6;font-size:16px;margin-bottom:24px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.trust-row{display:flex;gap:20px;flex-wrap:wrap;font-size:13px;color:#848E9C}
.trust-row b{color:#fff}
/* Hero 右侧注册卡 */
.reg-card{background:#fff;color:var(--text);border-radius:16px;padding:26px;box-shadow:0 20px 40px rgba(0,0,0,.25)}
.reg-card h3{color:var(--ink);font-size:18px;margin-bottom:4px}
.reg-card .muted{font-size:13px;color:var(--sub);margin-bottom:18px}
.ref-box{background:var(--bg);border:1px dashed var(--line);border-radius:8px;padding:10px 14px;display:flex;justify-content:space-between;align-items:center;font-size:14px;margin-bottom:16px}
.ref-box code{color:var(--bnb-dark);font-weight:700}
.copy{color:var(--bnb-dark);font-weight:600;cursor:pointer;font-size:13px}
.reg-card .btn-primary{width:100%;margin-bottom:10px}
.reg-card .fine{font-size:11px;color:var(--sub);text-align:center;line-height:1.5}

/* 通用 section */
section.block{padding:48px 0}
.sec-head{text-align:center;margin-bottom:34px}
.sec-head h2{font-size:26px;color:var(--ink);margin-bottom:8px}
.sec-head p{color:var(--sub);font-size:14px}

/* 步骤 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px}
.step .n{width:34px;height:34px;border-radius:50%;background:var(--bnb);color:var(--ink);font-weight:800;display:flex;align-items:center;justify-content:center;margin-bottom:12px}
.step h4{color:var(--ink);font-size:15px;margin-bottom:6px}
.step p{font-size:13px;color:var(--sub)}

/* 返佣说明 */
.rebate{background:var(--ink-2);color:#fff;border-radius:16px;padding:36px;display:grid;grid-template-columns:1fr 1fr;gap:30px;align-items:center}
.rebate h3{font-size:22px;margin-bottom:12px}
.rebate h3 span{color:var(--bnb)}
.rebate ul{list-style:none;display:flex;flex-direction:column;gap:10px;font-size:14px;color:#B7BDC6}
.rebate ul b{color:#fff}
.rebate .num{font-size:44px;font-weight:800;color:var(--bnb);line-height:1}
.rebate .note{font-size:12px;color:#848E9C;margin-top:8px}

/* 下载引导 */
.download-guide{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;text-align:center}
.dl-card .ico{font-size:30px;margin-bottom:10px}
.dl-card h4{color:var(--ink);font-size:15px;margin-bottom:6px}
.dl-card p{font-size:12px;color:var(--sub);margin-bottom:14px}
.dl-card a{display:inline-block;font-size:13px;color:var(--bnb-dark);font-weight:700;border:1px solid var(--line);border-radius:6px;padding:8px 16px}
.dl-card a:hover{border-color:var(--bnb)}
.official-note{margin-top:18px;background:#FFF9E6;border:1px solid #FCE9A8;border-radius:8px;padding:12px 16px;font-size:13px;color:#8A6D00;text-align:center}

/* FAQ */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:16px 20px;margin-bottom:12px}
.faq summary{font-weight:600;color:var(--ink);cursor:pointer;font-size:15px;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{content:"＋";color:var(--bnb-dark);font-weight:800;margin-right:10px}
.faq details[open] summary::before{content:"－"}
.faq p{margin-top:12px;font-size:14px;color:var(--sub);line-height:1.7}

/* 风险提示 */
.risk{background:#FFF5F6;border:1px solid #FBD5DA;border-left:4px solid var(--warn);border-radius:8px;padding:20px 24px;margin:30px 0}
.risk h4{color:var(--warn);font-size:15px;margin-bottom:8px}
.risk p{font-size:13px;color:#8A3D45;line-height:1.7}

/* 页脚 */
footer{background:var(--ink);color:#848E9C;padding:36px 0 24px;font-size:13px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;margin-bottom:24px}
.foot-grid h5{color:#EAECEF;font-size:14px;margin-bottom:12px}
.foot-grid ul{list-style:none;line-height:2}
.foot-grid a:hover{color:var(--bnb)}
.disclaimer{border-top:1px solid #2B3139;padding-top:18px;font-size:12px;line-height:1.7;color:#5E6673}

/* App 介绍 */
.app-intro{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.app-intro .txt h2{font-size:26px;color:var(--ink);margin-bottom:14px}
.app-feat{list-style:none;display:flex;flex-direction:column;gap:16px}
.app-feat li{display:flex;gap:14px}
.app-feat .fi{width:42px;height:42px;flex-shrink:0;border-radius:11px;background:#FEF6DA;color:var(--bnb-dark);display:flex;align-items:center;justify-content:center;font-size:20px}
.app-feat h4{color:var(--ink);font-size:15px;margin-bottom:2px}
.app-feat p{font-size:13px;color:var(--sub);line-height:1.6}
/* App 展示端机 */
.phone-show{display:flex;justify-content:center;gap:16px}
.phone{width:210px;background:var(--ink);border-radius:30px;padding:10px;box-shadow:0 24px 50px rgba(24,26,32,.25)}
.phone.tilt{transform:rotate(-4deg) translateY(10px)}
.phone-screen{background:#fff;border-radius:22px;overflow:hidden;height:420px;display:flex;flex-direction:column}
.ps-status{background:var(--ink);color:#fff;font-size:10px;display:flex;justify-content:space-between;padding:8px 16px}
.ps-body{flex:1;padding:14px;display:flex;flex-direction:column;gap:10px}
.ps-pair{display:flex;justify-content:space-between;align-items:center;font-size:12px;padding:8px 10px;border-radius:8px;background:var(--bg)}
.ps-pair b{color:var(--ink)}
.ps-up{color:var(--ok);font-weight:700}
.ps-down{color:var(--warn);font-weight:700}
.ps-chart{height:90px;background:linear-gradient(180deg,rgba(240,185,11,.18),rgba(240,185,11,0));border-top:2px solid var(--bnb);border-radius:6px}
.ps-hd{font-size:13px;font-weight:800;color:var(--ink);margin-bottom:2px}
.ps-tabbar{display:flex;justify-content:space-around;border-top:1px solid var(--line);padding:8px 0;font-size:9px;color:var(--sub)}
.ps-tabbar .on{color:var(--bnb-dark);font-weight:700}
.ps-balance{background:linear-gradient(135deg,var(--ink),var(--ink-2));color:#fff;border-radius:12px;padding:14px}
.ps-balance .lb{font-size:10px;color:#B7BDC6}
.ps-balance .amt{font-size:22px;font-weight:800;margin:2px 0}
.ps-balance .amt span{color:var(--bnb)}

/* 截图画廊 */
.shot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.shot{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:14px;text-align:center}
.shot .sc{height:300px;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;background:#fff}
.shot .sc .top{background:var(--ink);color:#fff;font-size:9px;display:flex;justify-content:space-between;padding:7px 12px}
.shot .sc .mid{flex:1;padding:14px;display:flex;flex-direction:column;gap:8px}
.shot .cap{margin-top:12px;font-size:14px;font-weight:600;color:var(--ink)}
.shot .sub{font-size:12px;color:var(--sub);margin-top:2px}
.mini-ico{width:40px;height:40px;border-radius:50%;background:#FEF6DA;color:var(--bnb-dark);display:flex;align-items:center;justify-content:center;font-size:20px;margin:6px auto}
.mini-row{display:flex;justify-content:space-between;font-size:11px;background:var(--bg);border-radius:6px;padding:6px 9px}
.illus-note{text-align:center;font-size:12px;color:var(--sub);margin-top:18px}

/* 安装指南 */
.install-tip{background:#EAF7EE;border:1px solid #BFE8CB;border-radius:12px;padding:18px 22px;margin-bottom:24px;display:flex;gap:14px;align-items:flex-start}
.install-tip .ic{font-size:22px}
.install-tip h4{color:#127A3B;font-size:15px;margin-bottom:4px}
.install-tip p{font-size:13px;color:#2E6B44;line-height:1.6}
.install-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:28px}
.istep{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;position:relative}
.istep .n{position:absolute;top:-12px;left:20px;width:26px;height:26px;border-radius:50%;background:var(--ink);color:#fff;font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.istep h4{color:var(--ink);font-size:14px;margin:8px 0 6px}
.istep p{font-size:12px;color:var(--sub);line-height:1.6}
.brand-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.brand-card{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:18px}
.brand-card .bh{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.brand-card .bh .bi{width:30px;height:30px;border-radius:8px;background:var(--bg);display:flex;align-items:center;justify-content:center;font-size:16px}
.brand-card h4{color:var(--ink);font-size:14px}
.brand-card .os{font-size:11px;color:var(--sub)}
.brand-card p{font-size:12px;color:var(--sub);line-height:1.6;margin-top:6px}
.brand-card .path{font-size:11px;color:var(--ink-2);background:var(--bg);border-radius:6px;padding:6px 9px;margin-top:8px;line-height:1.5}
.keep-safe{margin-top:24px;background:#FFF9E6;border:1px solid #FCE9A8;border-left:4px solid var(--bnb);border-radius:8px;padding:16px 20px}
.keep-safe h4{color:#8A6D00;font-size:14px;margin-bottom:6px}
.keep-safe p{font-size:13px;color:#8A6D00;line-height:1.7}

.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(80px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:8px;font-size:14px;opacity:0;transition:.3s;z-index:200}
.toast.show{transform:translateX(-50%) translateY(0);opacity:1}

/* 移动端常驻操作栏（默认隐藏，手机端显示） */
.mobile-bar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:150;background:#fff;border-top:1px solid var(--line);padding:10px 14px calc(10px + env(safe-area-inset-bottom));gap:10px;box-shadow:0 -4px 16px rgba(0,0,0,.08)}
.mobile-bar a{flex:1;text-align:center;border-radius:10px;font-weight:700;font-size:15px;padding:13px 0}
.mobile-bar .m-reg{background:var(--bnb);color:var(--ink)}
.mobile-bar .m-dl{background:#fff;border:1px solid var(--line);color:var(--ink)}

/* ============ 响应式断点 ============ */

/* 平板：多列网格降为两列 */
@media(max-width:900px){
  .hero-grid,.rebate,.app-intro{grid-template-columns:1fr;gap:30px}
  .steps,.download-guide,.shot-grid,.install-steps,.brand-grid{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .hero h1{font-size:30px}
  .phone.tilt{display:none}
  .app-intro .txt{order:1}
  .phone-show{order:2}
}

/* 平板竖屏起：收起顶部内联导航，改用底部常驻操作栏 */
@media(max-width:820px){
  .nav-links{display:none}
  .nav .btn-primary{display:none}
  .badge{display:none}
  .mobile-bar{display:flex}
  body{padding-bottom:76px}
  .toast{bottom:88px}
}

/* 手机：全部单列 + 字号/间距收敛 + 触控优化 + 底部操作栏 */
@media(max-width:640px){
  .container{padding:0 16px}
  section.block{padding:36px 0}
  .sec-head{margin-bottom:24px}
  .sec-head h2{font-size:21px}
  .sec-head p{font-size:13px}

  /* 头部：隐藏内联导航与顶部按钮，改用底部常驻栏 */
  .nav{height:54px}
  .nav-links{display:none}
  .nav .btn-primary{display:none}
  .logo{font-size:16px}
  .badge{display:none}

  /* Hero 居中堆叠 */
  .hero{padding:40px 0 34px;text-align:center}
  .hero h1{font-size:25px;line-height:1.35}
  .hero p.lead{font-size:15px}
  .hero-cta{flex-direction:column;gap:10px}
  .hero-cta .btn{width:100%;padding:14px}
  .trust-row{justify-content:center;gap:14px;font-size:12px}
  .reg-card{padding:20px}

  /* 网格全部单列 */
  .steps,.download-guide,.shot-grid,.install-steps,.brand-grid,.foot-grid{grid-template-columns:1fr}
  .meta-table{grid-template-columns:1fr}

  /* 返佣卡内边距收敛 */
  .rebate{padding:26px 20px}
  .rebate .num{font-size:36px}

  /* 手机示意图缩放，截图卡限高 */
  .phone{width:190px}
  .phone-screen{height:380px}
  .shot .sc{height:auto;min-height:260px}

  /* 触控区≥44px */
  .btn-ghost{padding:14px 22px}
  .nav-links a,.faq summary,.copy{padding-top:4px;padding-bottom:4px}

  /* FAQ / 安装卡内边距 */
  .faq details{padding:14px 16px}
  .install-tip{padding:16px}
  .rebate{gap:20px}

  /* 底部常驻操作栏显示 + 给 body 让位 */
  .mobile-bar{display:flex}
  body{padding-bottom:76px}
  .toast{bottom:88px}
}

/* 小屏手机进一步收敛 */
@media(max-width:380px){
  .hero h1{font-size:22px}
  .sec-head h2{font-size:19px}
  .ref-box{font-size:13px}
  .rebate .num{font-size:30px}
}

/* 已适配的用户偏好：减少动效 */
@media(prefers-reduced-motion:reduce){
  *{transition:none!important}
}