/* cqsxld.com — Binance中文官网 站点样式（参照 lkity.com 设计语言：白底 + 蓝 #176bff + 圆角卡片 + 居中标题）*/
:root{
  --blue:#176bff; --blue-d:#0b4ac7; --blue-l:#61b6ff;
  --navy:#071b3d; --navy2:#0d2a5c;
  --bg:#ffffff; --bg2:#f5f9ff; --bg3:#eaf3ff;
  --bd:#dbe8ff; --bd2:#cbd8e8;
  --tx:#0f1b2e; --tx2:#637184; --tx3:#8f9bad;
  --wrap:1120px; --r:14px;
}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);color:var(--tx);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;font-size:15px;line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 24px;width:100%}

/* ============ 导航（白底居中）============ */
.navw{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--bd)}
.navw .wrap{display:flex;align-items:center;justify-content:space-between;height:66px;gap:20px}
.lg{display:flex;align-items:center;gap:9px;font-size:17px;font-weight:700;letter-spacing:-.2px}
.lg .mk{width:28px;height:28px;border-radius:50%;background:var(--blue);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.lg .mk svg{width:15px;height:15px}
.lg .bk{color:var(--tx)}
.lg .bl{color:var(--blue)}
.nmenu{display:flex;gap:30px}
.nmenu a{font-size:14px;color:var(--tx2);transition:.16s;padding:4px 0}
.nmenu a:hover,.nmenu a.on{color:var(--blue)}
.mbtn{display:none;background:none;border:1px solid var(--bd2);border-radius:8px;width:40px;height:38px;position:relative;cursor:pointer}
.mbtn i{position:absolute;left:11px;width:18px;height:2px;background:var(--tx);border-radius:2px}
.mbtn i:nth-child(1){top:12px}.mbtn i:nth-child(2){top:18px}.mbtn i:nth-child(3){top:24px}
.mnav{display:none;background:#fff;border-bottom:1px solid var(--bd)}
.mnav.open{display:block}
.mnav a{display:block;padding:14px 24px;border-bottom:1px solid var(--bg3);font-size:15px;color:var(--tx2)}
.mnav a:hover{color:var(--blue);background:var(--bg2)}

/* ============ 通用按钮 ============ */
.btnb{display:inline-block;background:var(--blue);color:#fff;font-weight:600;font-size:15px;padding:13px 32px;border-radius:999px;transition:.18s;box-shadow:0 3px 10px rgba(23,107,255,.20)}
.btnb:hover{background:var(--blue-d);transform:translateY(-1px)}
.btnbsm{display:inline-block;background:var(--blue);color:#fff;font-weight:600;font-size:13.5px;padding:9px 22px;border-radius:999px;transition:.18s}
.btnbsm:hover{background:var(--blue-d)}
.btnnavy{display:inline-block;background:var(--navy);color:#fff;font-weight:600;font-size:13.5px;padding:10px 24px;border-radius:999px;transition:.18s}
.btnnavy:hover{background:var(--navy2)}

/* ============ 首屏 ============ */
.hero{background:linear-gradient(165deg,#eef6ff 0%,#f7fbff 45%,#ffffff 100%);padding:64px 0 56px;overflow:hidden;position:relative}
.hero .wrap{display:grid;grid-template-columns:1.02fr .98fr;gap:40px;align-items:center}
.hero h1{font-size:52px;line-height:1.24;font-weight:800;letter-spacing:-1px;margin-bottom:22px}
.hero h1 .bl{color:var(--blue)}
.hero .sub{font-size:15.5px;color:var(--tx2);line-height:2;max-width:520px;margin-bottom:30px}
.checks{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--tx2);margin-top:26px}
.checks::before{content:"";width:15px;height:15px;border-radius:50%;background:var(--blue);flex-shrink:0;
  background-image:linear-gradient(var(--blue),var(--blue));position:relative}
.chk{display:flex;align-items:flex-start;gap:9px;font-size:13.5px;color:var(--tx2);margin-top:24px;line-height:1.7}
.chk svg{width:16px;height:16px;flex-shrink:0;margin-top:3px}
/* 右侧 CSS 绘制的手机 + 图表插画 */
.art{position:relative;height:360px}
.art .glow{position:absolute;inset:16px 10px 0 26px;border-radius:26px;background:linear-gradient(150deg,#e3efff,#f2f8ff 55%,#dbe9ff);border:1px solid #dfeaff}
.art .phone{position:absolute;right:60px;top:34px;width:190px;height:300px;border-radius:26px;background:#fff;border:1px solid #d6e3f7;box-shadow:0 20px 44px rgba(11,74,199,.16);padding:16px 13px}
.art .phone .bar{height:9px;border-radius:5px;background:#e9f1fd;margin-bottom:9px}
.art .phone .bar.s{width:56%}
.art .phone .bar.m{width:78%;height:13px;background:#dceaff}
.art .chart{display:flex;align-items:flex-end;gap:5px;height:74px;margin:14px 0 12px}
.art .chart i{flex:1;border-radius:3px 3px 0 0;background:linear-gradient(180deg,var(--blue-l),var(--blue))}
.art .phone .ln{height:8px;border-radius:4px;background:#eef5ff;margin-bottom:7px}
.art .phone .ln:nth-child(odd){width:82%}
.art .phone .ln:nth-child(even){width:64%}
.art .phone .pillb{height:30px;border-radius:8px;background:var(--blue);margin-top:12px}
.art .shield{position:absolute;right:24px;top:150px;width:66px;height:66px;border-radius:18px;background:#fff;border:1px solid #dbe8ff;box-shadow:0 12px 26px rgba(11,74,199,.14);display:flex;align-items:center;justify-content:center}
.art .shield svg{width:30px;height:30px}
.art .mini{position:absolute;left:26px;bottom:34px;width:132px;border-radius:12px;background:#fff;border:1px solid #dbe8ff;box-shadow:0 12px 26px rgba(11,74,199,.12);padding:12px 14px}
.art .mini b{display:block;font-size:11px;color:var(--tx3);font-weight:500;margin-bottom:6px}
.art .mini .spark{display:flex;align-items:flex-end;gap:3px;height:26px}
.art .mini .spark i{flex:1;border-radius:2px;background:#bcd8ff}
.art .mini .spark i.hi{background:var(--blue)}

/* ============ 三卡 ============ */
.row3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:-30px;position:relative;z-index:5}
.c3{background:#fff;border:1px solid var(--bd);border-radius:var(--r);padding:26px 24px;box-shadow:0 8px 24px rgba(11,74,199,.06);transition:.2s}
.c3:hover{box-shadow:0 14px 32px rgba(11,74,199,.12);transform:translateY(-2px)}
.c3 h3{font-size:16px;font-weight:700;margin-bottom:10px}
.c3 p{font-size:13.5px;color:var(--tx2);line-height:1.85}

/* ============ 居中标题 ============ */
.center-head{text-align:center;max-width:680px;margin:0 auto 38px}
.center-head h2{font-size:30px;font-weight:800;letter-spacing:-.5px;margin-bottom:14px}
.center-head .ul{width:44px;height:3px;border-radius:2px;background:var(--blue);margin:0 auto 18px}
.center-head p{font-size:14px;color:var(--tx2);line-height:1.9}

/* ============ 区块 ============ */
.sec{padding:72px 0}
.sec.band{background:var(--bg2)}
.sec.band2{background:var(--bg3)}
.sec .lead2{max-width:760px;margin:0 auto;text-align:center;font-size:14.5px;color:var(--tx2);line-height:2}

/* ============ 四列编号卡 ============ */
.row4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.c4{background:#fff;border:1px solid var(--bd);border-radius:var(--r);padding:26px 22px;transition:.2s}
.c4:hover{box-shadow:0 14px 32px rgba(11,74,199,.1);transform:translateY(-2px)}
.c4 .no{font-size:15px;font-weight:800;color:var(--blue);letter-spacing:1px;margin-bottom:14px;font-variant-numeric:tabular-nums}
.c4 h3{font-size:15.5px;font-weight:700;margin-bottom:9px}
.c4 p{font-size:13px;color:var(--tx2);line-height:1.85}

/* ============ 两大卡（移动端支持）============ */
.big2{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.bg2c{background:linear-gradient(150deg,#eef6ff,#ffffff 60%);border:1px solid var(--bd);border-radius:18px;padding:32px 30px;position:relative;overflow:hidden}
.bg2c::after{content:"";position:absolute;right:-40px;top:-40px;width:150px;height:150px;border-radius:50%;background:rgba(97,182,255,.12)}
.bg2c .badge{display:inline-block;font-size:12px;font-weight:700;color:var(--blue);background:#fff;border:1px solid var(--bd);border-radius:6px;padding:3px 11px;margin-bottom:16px}
.bg2c h3{font-size:19px;font-weight:700;margin-bottom:12px}
.bg2c p{font-size:13.5px;color:var(--tx2);line-height:1.9;margin-bottom:22px;max-width:420px}

/* ============ 深蓝大卡（账户安全）============ */
.darkwrap{padding:0 0 72px}
.dark{background:linear-gradient(120deg,var(--navy) 0%,#0b3fa8 55%,var(--blue) 100%);border-radius:22px;padding:52px 48px;display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;align-items:center;box-shadow:0 24px 54px rgba(11,74,199,.24)}
.dark h2{font-size:27px;font-weight:800;color:#fff;margin-bottom:16px;letter-spacing:-.3px}
.dark p{font-size:13.5px;color:rgba(255,255,255,.76);line-height:2}
.pills{display:flex;flex-direction:column;gap:11px}
.pillw{background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.2);border-radius:10px;padding:14px 20px;font-size:13.5px;color:#fff;backdrop-filter:blur(6px)}

/* ============ FAQ ============ */
.faqs{display:flex;flex-direction:column;gap:14px}
.fq{background:#fff;border:1px solid var(--bd);border-radius:var(--r)}
.fq summary{list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:13px;padding:20px 24px;font-size:15.5px;font-weight:600}
.fq summary::-webkit-details-marker{display:none}
.fq .qi{width:24px;height:24px;border-radius:7px;background:var(--bg3);color:var(--blue);font-size:12.5px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0;margin-top:2px}
.fq .ar{margin-left:auto;color:var(--tx3);font-size:18px;line-height:1;transition:.2s;flex-shrink:0}
.fq[open] .ar{transform:rotate(45deg);color:var(--blue)}
.fq .ans{padding:0 24px 22px 61px;font-size:14px;color:var(--tx2);line-height:1.95}

/* ============ 开始使用卡片 ============ */
.startcard{border:1px solid var(--bd);border-radius:18px;padding:38px 44px;display:flex;align-items:center;justify-content:space-between;gap:28px;background:linear-gradient(100deg,#f7fbff,#ffffff 60%)}
.startcard h3{font-size:22px;font-weight:700;margin-bottom:8px}
.startcard p{font-size:13.5px;color:var(--tx2)}

/* ============ 页脚 ============ */
footer{background:var(--navy);color:#fff;padding:52px 0 0;margin-top:0}
.fg{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;padding-bottom:34px}
.fg h4{font-size:14px;font-weight:700;margin-bottom:16px;color:#fff}
.fg a{display:block;font-size:13px;color:rgba(255,255,255,.6);padding:5px 0;transition:.16s}
.fg a:hover{color:#fff}
.fbar{border-top:1px solid rgba(255,255,255,.14);padding:22px 0 26px;text-align:center}
.fbar .risk{font-size:12.5px;color:rgba(255,255,255,.56);line-height:1.8;margin-bottom:10px}
.fbar .cp{font-size:13px;color:rgba(255,255,255,.82);font-weight:600}

/* ============================================================
   L1 分类页
   ============================================================ */
.ph{background:linear-gradient(165deg,#eef6ff,#f8fbff 60%,#fff);padding:38px 0 30px;border-bottom:1px solid var(--bd)}
.crumb{font-size:13px;color:var(--tx3);margin-bottom:14px}
.crumb a:hover{color:var(--blue)}
.ph h1{font-size:32px;font-weight:800;letter-spacing:-.5px;margin-bottom:12px}
.ph p{font-size:14px;color:var(--tx2);max-width:760px;line-height:1.95}
.tabs{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.tabs a{font-size:13.5px;padding:8px 20px;border-radius:999px;border:1px solid var(--bd2);color:var(--tx2);background:#fff;transition:.16s}
.tabs a:hover{border-color:var(--blue);color:var(--blue)}
.tabs a.on{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:600}
.listwrap{padding:34px 0 64px}
.lrow{display:flex;gap:20px;align-items:flex-start;background:#fff;border:1px solid var(--bd);border-radius:var(--r);padding:22px 26px;margin-bottom:14px;transition:.18s}
.lrow:hover{border-color:#b9d3ff;box-shadow:0 12px 30px rgba(11,74,199,.1);transform:translateY(-2px)}
.lrow .dt{flex-shrink:0;width:74px;text-align:center;border-right:1px solid var(--bg3);padding-right:18px}
.lrow .dt b{display:block;font-size:25px;font-weight:800;color:var(--blue);line-height:1.1;font-variant-numeric:tabular-nums}
.lrow .dt span{font-size:12px;color:var(--tx3)}
.lrow .mn{flex:1;min-width:0}
.lrow h3{font-size:16.5px;font-weight:700;margin-bottom:8px}
.lrow:hover h3{color:var(--blue)}
.lrow p{font-size:13.5px;color:var(--tx2);line-height:1.8;margin-bottom:11px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.lrow .mt{display:flex;gap:12px;align-items:center;font-size:12.5px;color:var(--tx3)}
.lrow .tg{font-size:12px;color:var(--blue);background:var(--bg3);border-radius:6px;padding:2px 10px}
.lrow .more{margin-left:auto;color:var(--blue);font-weight:600}
.pager{display:flex;gap:8px;justify-content:center;padding-top:18px}
.pager a{min-width:38px;height:38px;line-height:36px;text-align:center;border:1px solid var(--bd2);border-radius:10px;font-size:13.5px;color:var(--tx2);padding:0 11px;background:#fff}
.pager a:hover{border-color:var(--blue);color:var(--blue)}
.pager a.cur{background:var(--blue);border-color:var(--blue);color:#fff;font-weight:700}

/* ============================================================
   L2 文章页
   ============================================================ */
.ah{background:linear-gradient(165deg,#eef6ff,#f8fbff 60%,#fff);padding:40px 0 34px;border-bottom:1px solid var(--bd)}
.ah .in{max-width:840px;margin:0 auto}
.ah h1{font-size:33px;line-height:1.42;font-weight:800;letter-spacing:-.5px;margin:12px 0 20px}
.am{display:flex;gap:22px;flex-wrap:wrap;font-size:13px;color:var(--tx3);padding-top:16px;border-top:1px solid var(--bd)}
.am b{color:var(--tx2);font-weight:600}
.abad{padding:36px 0 60px}
.abad .in{max-width:840px;margin:0 auto}
.abad p{font-size:15.5px;color:#3b4a5e;line-height:2.1;margin-bottom:20px}
.abad h2{font-size:21px;font-weight:700;margin:36px 0 16px;display:flex;align-items:center;gap:11px}
.abad h2::before{content:"";width:4px;height:20px;border-radius:2px;background:var(--blue);flex-shrink:0}
.abad figure{margin:28px 0;border-radius:var(--r);overflow:hidden;border:1px solid var(--bd)}
.abad .imph{height:280px;background:linear-gradient(135deg,#e8f2ff,#f6fbff 50%,#dfeaff);display:flex;align-items:center;justify-content:center;color:#8fb4e8;font-size:13px;letter-spacing:2px}
.anote{margin-top:30px;background:var(--bg2);border:1px solid var(--bd);border-left:4px solid var(--blue);border-radius:0 10px 10px 0;padding:18px 22px;font-size:13px;color:var(--tx2);line-height:1.9}
.acards{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px;margin-top:30px}
.ac{background:#fff;border:1px solid var(--bd);border-radius:var(--r);padding:20px 22px;transition:.18s}
.ac:hover{border-color:#b9d3ff;box-shadow:0 12px 28px rgba(11,74,199,.1)}
.ac span{display:block;font-size:12px;color:var(--tx3);margin-bottom:7px}
.ac b{font-size:14.5px;font-weight:600;line-height:1.6}
.ac.mid{text-align:center;background:var(--bg2)}
.ac.mid b{color:var(--blue)}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width:1000px){
  .hero .wrap{grid-template-columns:1fr;gap:30px}
  .art{height:320px}
  .row3{grid-template-columns:1fr;margin-top:34px}
  .row4{grid-template-columns:1fr 1fr}
  .dark{grid-template-columns:1fr;gap:28px;padding:38px 30px}
  .big2{grid-template-columns:1fr}
  .acards{grid-template-columns:1fr}
  .fg{grid-template-columns:1fr 1fr;gap:22px}
  .startcard{flex-direction:column;align-items:flex-start;padding:30px}
}
@media (max-width:900px){
  .nmenu{display:none}
  .mbtn{display:block}
  .hero h1{font-size:34px}
  .hero{padding:42px 0 40px}
  .sec{padding:54px 0}
  .center-head h2{font-size:24px}
  .ph h1{font-size:26px}
  .ah h1{font-size:24px}
  .row4{grid-template-columns:1fr}
  .lrow{padding:18px 20px;gap:14px}
}
@media (max-width:600px){
  .hero h1{font-size:28px}
  .hero .sub{font-size:14.5px}
  .hero .art{height:280px}
  .art .phone{right:30px;width:164px;height:262px}
  .art .mini{left:8px;width:112px}
  .art .shield{right:6px;top:132px;width:56px;height:56px}
  .fg{grid-template-columns:1fr}
  .lrow .dt{width:56px;padding-right:12px}
  .lrow .dt b{font-size:20px}
  .lrow .more{display:none}
  .btnb{padding:12px 28px;font-size:14.5px}
  .startcard{padding:24px 20px}
}

/* ============================================================
   信息页 / 404（信任页专用）
   ============================================================ */
.pg-body{padding:38px 0 64px}
.pg-body .in{max-width:840px;margin:0 auto}
.pg-card{background:#fff;border:1px solid var(--bd);border-radius:var(--r);padding:36px 40px}
.pg-card h2{font-size:20px;font-weight:700;margin:30px 0 14px;display:flex;align-items:center;gap:11px}
.pg-card h2:first-child{margin-top:0}
.pg-card h2::before{content:"";width:4px;height:19px;border-radius:2px;background:var(--blue);flex-shrink:0}
.pg-card p{font-size:14.5px;color:#3b4a5e;line-height:2;margin-bottom:14px}
.pg-card ul{list-style:none;margin:0 0 14px}
.pg-card li{font-size:14px;color:#3b4a5e;line-height:1.95;padding-left:20px;position:relative;margin-bottom:9px}
.pg-card li::before{content:"";position:absolute;left:0;top:12px;width:6px;height:6px;border-radius:50%;background:var(--blue)}
.err-box{text-align:center;padding:20px 0 8px}
.err-box .code{font-size:56px;font-weight:800;color:var(--blue);line-height:1;margin-bottom:14px;letter-spacing:-2px}
@media (max-width:600px){.pg-card{padding:26px 20px}.err-box .code{font-size:44px}}