/* ==========================================================
   Nexkir 官网共享样式（多页版）
   ========================================================== */
:root{
  --bg:#0b0d12; --card:#141821; --line:#232936; --text:#eef1f7; --muted:#98a1b3;
  --brand:#6c5ce7; --brand-2:#a29bfe; --accent:#00d4b8; --radius:16px;
  --nav-h:64px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{width:100%;max-width:1120px;margin:0 auto;padding:0 20px}

/* ---------- 导航 ---------- */
header{position:fixed;top:0;left:0;right:0;z-index:50;backdrop-filter:blur(14px);background:rgba(11,13,18,.78);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h)}
.logo{font-weight:800;font-size:20px;letter-spacing:.5px}
.logo span{background:linear-gradient(90deg,var(--brand-2),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.menu{display:flex;align-items:center;gap:4px}
.menu a{padding:8px 14px;border-radius:10px;color:var(--muted);font-size:15px;font-weight:500}
.menu a:hover{color:var(--text);background:rgba(255,255,255,.06)}
.menu a.active{color:var(--text);background:rgba(108,92,231,.18)}
.burger{display:none;background:none;border:none;color:var(--text);font-size:24px;cursor:pointer;padding:4px 8px}
.mnav{display:none;position:fixed;top:var(--nav-h);left:0;right:0;background:rgba(11,13,18,.98);border-bottom:1px solid var(--line);padding:10px 20px 16px;z-index:49}
.mnav a{display:block;padding:12px 10px;border-radius:10px;color:var(--text);font-weight:500}
.mnav a:hover{background:rgba(255,255,255,.06)}
.mnav.open{display:block}

/* ---------- 页头 ---------- */
.page-head{padding:calc(var(--nav-h) + 70px) 0 50px;text-align:center;position:relative;overflow:hidden}
.page-head:before{content:'';position:absolute;inset:0;background:radial-gradient(620px 300px at 50% 0,rgba(108,92,231,.22),transparent)}
.page-head>*{position:relative}
.page-head h1{font-size:clamp(30px,5.2vw,48px);line-height:1.18;margin:0 0 14px;font-weight:800;letter-spacing:-.5px}
.page-head p{max-width:640px;margin:0 auto;color:var(--muted);font-size:clamp(15px,2vw,18px)}

/* ---------- 通用区块 ---------- */
section{padding:64px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head h2{font-size:clamp(24px,3.6vw,34px);margin:0 0 10px;font-weight:800}
.sec-head p{color:var(--muted);margin:0;font-size:16px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.ic{font-size:26px;margin-bottom:10px}
h3{margin:0 0 8px;font-size:18px}
.muted{color:var(--muted);font-size:14px}

.btn{display:inline-block;padding:13px 26px;border-radius:12px;font-weight:600;font-size:16px;border:1px solid transparent;cursor:pointer}
.btn-p{background:var(--brand);color:#fff}
.btn-p:hover{background:var(--brand-2)}
.btn-s{border-color:var(--line);color:var(--text);background:rgba(255,255,255,.03)}
.btn-s:hover{border-color:var(--brand-2)}
.btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:28px}
.pill{display:inline-block;font-size:12px;padding:2px 8px;border-radius:999px;background:rgba(108,92,231,.15);color:var(--brand-2);font-weight:600}
.pill.ok{background:rgba(46,204,113,.15);color:#2ecc71}
.pill.soon{background:rgba(255,255,255,.07);color:var(--muted)}

/* ---------- 关于页 ---------- */
.about-hero{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.tl{position:relative;padding-left:26px;margin-top:8px}
.tl:before{content:'';position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(180deg,var(--brand),var(--accent))}
.tl-item{position:relative;padding:0 0 22px 6px}
.tl-item:before{content:'';position:absolute;left:-24px;top:7px;width:12px;height:12px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(108,92,231,.18)}
.tl-item .y{font-weight:700;color:var(--brand-2);font-size:14px}
.value-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.value-card .ic{font-size:28px}

/* ---------- 下载页 ---------- */
.dl{max-width:860px;margin:0 auto;display:grid;gap:18px}
.dcard{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.dcard .ic{font-size:38px;margin:0}
.dinfo{flex:1;min-width:200px}
.dinfo h3{margin:0 0 4px}
.dinfo p{margin:0;color:var(--muted);font-size:14px}
.qr{width:104px;height:104px;border-radius:12px;background:#fff;padding:6px;flex-shrink:0}
.qr-cap{text-align:center;font-size:11px;color:var(--muted);margin-top:4px}
.steps{counter-reset:s;max-width:720px;margin:0 auto;display:grid;gap:14px}
.step{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px 18px 60px;position:relative}
.step:before{content:counter(s);position:absolute;left:18px;top:18px;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.step h3{margin:0 0 4px;font-size:17px}
.step p{margin:0;color:var(--muted);font-size:14px}

/* ---------- 联系页 ---------- */
.contact{max-width:680px;margin:0 auto;display:grid;gap:14px}
.crow{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
.crow .ic{font-size:22px;margin:0}
.crow .t{font-weight:700;margin-bottom:2px}
.crow .d{color:var(--brand-2);font-size:15px;word-break:break-all;font-weight:600}
.crow .n{color:var(--muted);font-size:13px;margin-top:3px}
.faq{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.faq h3{margin:0 0 14px}
.faq-row{border-top:1px solid var(--line);padding:13px 0}
.faq-row:first-of-type{border-top:none;padding-top:0}
.faq-row .q{font-weight:600}
.faq-row .a{color:var(--muted);font-size:14px;margin-top:4px}

/* ---------- 页脚 ---------- */
footer{border-top:1px solid var(--line);padding:30px 0;color:var(--muted);font-size:14px;margin-top:20px}
.frow{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;align-items:center}
.fnav{display:flex;gap:16px;flex-wrap:wrap}
.fnav a:hover{color:var(--text)}

@media (max-width:820px){
  .menu{display:none}
  .burger{display:block}
  .page-head{padding-top:calc(var(--nav-h) + 44px)}
  .dcard{flex-direction:column;text-align:center}
}