:root{
  --bg:#0b0e1a; --card:rgba(255,255,255,.045); --line:rgba(255,255,255,.09);
  --txt:#e8edf7; --mut:#97a2ba; --p1:#6366f1; --p2:#22d3ee;
  --ok:#34d399; --warn:#fbbf24; --bad:#f87171;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:system-ui,-apple-system,'Segoe UI',Roboto,'PingFang SC','Microsoft YaHei',sans-serif;
  background:radial-gradient(1100px 560px at 72% -12%,rgba(99,102,241,.20),transparent 60%),
             radial-gradient(900px 500px at 0% 0%,rgba(34,211,238,.12),transparent 55%),var(--bg);
  color:var(--txt);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
.grad{background:linear-gradient(90deg,var(--p1),var(--p2));-webkit-background-clip:text;background-clip:text;color:transparent}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:12px;border:1px solid var(--line);
  background:var(--card);color:var(--txt);cursor:pointer;font-size:14px;font-weight:600;transition:.18s;backdrop-filter:blur(8px)}
.btn:hover{border-color:rgba(99,102,241,.6);transform:translateY(-1px)}
.btn.primary{background:linear-gradient(90deg,var(--p1),var(--p2));border:none;color:#06121f}
.btn.ghost{background:transparent}
.btn.lg{padding:14px 28px;font-size:15px}
.btn.block{width:100%}
input,select{width:100%;padding:12px 14px;border-radius:10px;border:1px solid var(--line);background:rgba(255,255,255,.03);color:var(--txt);font-size:14px;outline:none}
input:focus{border-color:var(--p1)}
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;backdrop-filter:blur(10px)}
.mut{color:var(--mut)}
.small{font-size:13px}
.row{display:flex;gap:12px;flex-wrap:wrap}
.row.center{justify-content:center}
.grid{display:grid;gap:16px}
.hide{display:none!important}

/* 导航 */
.nav{position:sticky;top:0;z-index:30;backdrop-filter:blur(14px);background:rgba(11,14,26,.6);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:20px;letter-spacing:.3px}
.navlinks{display:flex;gap:22px;align-items:center}
.navlinks a{color:var(--mut);font-size:14px;font-weight:500}
.navlinks a:hover{color:var(--txt)}
.navbtn{padding:8px 16px;border:1px solid var(--line);border-radius:999px;color:var(--txt)!important}
.navbtn:hover{border-color:rgba(99,102,241,.6)}

/* 落地页 */
.hero{padding:72px 0 40px;text-align:center}
.hero-tag{display:inline-block;font-size:12.5px;color:var(--mut);border:1px solid var(--line);padding:6px 14px;border-radius:999px;background:var(--card);margin-bottom:22px}
.hero h1{font-size:46px;line-height:1.15;font-weight:800;margin-bottom:16px}
.hero p{color:var(--mut);font-size:17px;max-width:660px;margin:0 auto 28px}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:42px;flex-wrap:wrap}
.hero-stats div{display:flex;flex-direction:column}
.hero-stats b{font-size:30px;font-weight:800;background:linear-gradient(90deg,var(--p1),var(--p2));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13px;color:var(--mut)}

/* 区块标题 */
.section{padding:48px 0}
.sec-head{text-align:center;margin-bottom:34px}
.sec-head h2{font-size:30px;font-weight:800}
.sec-head .sub{color:var(--mut);margin-top:8px}
.hint{text-align:center;color:var(--mut);font-size:13px;margin-top:18px}

/* 套餐 */
.plans{grid-template-columns:repeat(4,1fr)}
.plan{position:relative;display:flex;flex-direction:column;gap:10px}
.plan .name{font-size:18px;font-weight:700}
.plan .price{font-size:34px;font-weight:800}.plan .price small{font-size:15px;color:var(--mut);font-weight:500}
.plan ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin:8px 0;font-size:14px;color:var(--mut)}
.plan li::before{content:'✓';color:var(--ok);margin-right:8px;font-weight:700}
.plan .feat{margin-top:auto}
.plan.hot{border-color:rgba(99,102,241,.55);box-shadow:0 0 0 1px rgba(99,102,241,.25),0 20px 50px -30px rgba(99,102,241,.6)}
.tag{position:absolute;top:-11px;right:18px;background:linear-gradient(90deg,var(--p1),var(--p2));color:#06121f;font-size:11px;font-weight:800;padding:4px 10px;border-radius:999px}

/* 特性 / 节点 */
.feats{grid-template-columns:repeat(3,1fr)}
.feat .ico{font-size:24px;margin-bottom:8px}
.feat h3{font-size:16px;margin-bottom:4px}
.nodes{grid-template-columns:repeat(4,1fr)}
.node{display:flex;align-items:center;gap:12px}
.node .flag{font-size:26px}
.node .meta b{display:block;font-size:15px}

/* 客户端 */
.clients{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.client{display:flex;align-items:center;gap:10px;padding:16px;border:1px solid var(--line);border-radius:14px;background:var(--card);font-size:14px;font-weight:500}

/* FAQ */
.faq{display:flex;flex-direction:column;gap:12px;max-width:760px;margin:0 auto}
.faq details{border:1px solid var(--line);border-radius:14px;background:var(--card);padding:4px 18px}
.faq summary{cursor:pointer;font-weight:600;padding:12px 0;list-style:none}
.faq summary::-webkit-details-marker{display:none}
.faq p{padding:0 0 14px;color:var(--mut);font-size:14px}

/* 页脚 */
.foot{text-align:center;color:var(--mut);padding:40px 0;font-size:13px;border-top:1px solid var(--line);margin-top:20px}

/* 仪表盘 */
.dash{display:none;padding:30px 0 80px}
.dhead{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;flex-wrap:wrap;gap:12px}
.stats{grid-template-columns:repeat(4,1fr);margin-bottom:22px}
.stat{display:flex;flex-direction:column;gap:4px}
.stat .v{font-size:26px;font-weight:800}
.stat .k{font-size:13px;color:var(--mut)}
.dgrid{grid-template-columns:1.4fr 1fr;align-items:start}
.subbox{display:flex;flex-direction:column;gap:14px}
.subrow{display:flex;gap:10px;align-items:center}
.subrow input{font-family:monospace;font-size:13px;color:var(--mut)}
.subrow .btn{padding:10px 14px;white-space:nowrap}
.prog{height:12px;border-radius:999px;background:#2a2f3e;overflow:hidden;border:1px solid rgba(255,255,255,.08)}
.prog>i{display:block;height:100%;background:linear-gradient(90deg,var(--p1),var(--p2));transition:width .5s ease;min-width:2px}
.kv{display:flex;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border:none}

/* 邮箱验证横幅 */
.verify-banner{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;
  background:linear-gradient(90deg,rgba(99,102,241,.14),rgba(34,211,238,.10));border:1px solid rgba(99,102,241,.4);
  border-radius:16px;padding:16px 20px;margin-bottom:18px}
.vb-text{display:flex;flex-direction:column;gap:2px}
.vb-text b{font-size:15px}
.vb-act{display:flex;gap:10px;align-items:center}
.vb-act input{width:160px;letter-spacing:4px;text-align:center}
.verify-ok{text-align:center;color:var(--ok);font-weight:700;background:rgba(52,211,153,.1);border:1px solid rgba(52,211,153,.4);border-radius:12px;padding:12px;margin-bottom:18px}

/* 模态框 */
.modal{position:fixed;inset:0;background:rgba(4,6,14,.72);backdrop-filter:blur(6px);display:none;align-items:center;justify-content:center;padding:20px;z-index:50}
.modal.open{display:flex}
.mbox{width:100%;max-width:420px;position:relative}
.modal-x{position:absolute;top:14px;right:16px;background:none;border:none;color:var(--mut);font-size:24px;cursor:pointer;line-height:1}
.tabs{display:flex;gap:8px;margin-bottom:18px}
.tab{flex:1;text-align:center;padding:10px;border-radius:10px;cursor:pointer;color:var(--mut);border:1px solid var(--line);font-weight:600;font-size:14px}
.tab.active{background:var(--card);color:var(--txt);border-color:rgba(99,102,241,.5)}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--mut);margin-bottom:6px}
.msg{font-size:13px;margin-top:10px;min-height:18px}
.msg.err{color:var(--bad)}.msg.ok{color:var(--ok)}

@media(max-width:860px){
  .hero h1{font-size:34px}
  .plans,.feats,.nodes{grid-template-columns:repeat(2,1fr)}
  .clients{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .dgrid{grid-template-columns:1fr}
  .navlinks a:not(.navbtn){display:none}
}
@media(max-width:520px){
  .plans,.feats,.nodes,.clients,.stats{grid-template-columns:1fr}
  .hero-stats{gap:24px}
}

/* 选购 / 支付弹窗 */
#buyModal .mbox{max-width:760px}
#buyModal .plans{grid-template-columns:repeat(2,1fr)}
.pay-amt{text-align:center;background:rgba(52,211,153,.08);border:1px solid rgba(52,211,153,.35);border-radius:14px;padding:14px;margin-bottom:14px}
.pay-amt .amt{font-size:28px;font-weight:800;color:var(--ok);margin-top:4px;font-family:monospace;letter-spacing:.5px}
.pay-addr{margin-bottom:14px}
.pay-addr .addr{font-family:monospace;font-size:13px;word-break:break-all;background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:10px;padding:12px;margin:6px 0 10px;color:var(--txt)}
.pay-qr{text-align:center;margin-bottom:8px}
.pay-qr img{width:200px;height:200px;border-radius:12px;background:#fff;padding:8px}
@media(max-width:520px){
  #buyModal .plans{grid-template-columns:1fr}
}