:root{
  --bg:#0b0f1a;
  --bg2:#0f1524;
  --card:#141c2e;
  --card2:#18223a;
  --line:#243049;
  --txt:#e8edf7;
  --muted:#9aa7bd;
  --acc:#4f8cff;
  --acc2:#7c5cff;
  --good:#2ecc71;
  --r:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;
  background:radial-gradient(1200px 600px at 80% -10%,#1a2540 0%,var(--bg) 55%);
  color:var(--txt);line-height:1.6;min-height:100vh;
}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
a{color:inherit;text-decoration:none}
.center{text-align:center}
.hidden{display:none !important}

/* NAV */
.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(10px);
  background:rgba(11,15,26,.72);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:60px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.logo{width:30px;height:30px;display:grid;place-items:center;border-radius:9px;
  background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;font-size:18px}
.brand small{color:var(--muted);font-weight:500;font-size:13px;margin-left:2px}
.links{display:flex;gap:22px;color:var(--muted);font-size:15px}
.links a:hover{color:var(--txt)}

/* BUTTONS */
.btn{cursor:pointer;border:none;border-radius:12px;font-weight:600;font-size:15px;
  padding:11px 18px;transition:.15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;
  box-shadow:0 8px 24px rgba(79,140,255,.28)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:var(--card2);color:var(--txt);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--acc)}
.btn-sm{padding:8px 14px;font-size:14px}
.btn-lg{width:100%;padding:14px;font-size:16px}

/* HERO */
.hero{padding:64px 0 30px;text-align:center}
.hero h1{font-size:clamp(28px,5vw,46px);font-weight:800;letter-spacing:-.5px}
.hero h1 b{background:linear-gradient(90deg,var(--acc),var(--acc2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.sub{color:var(--muted);font-size:17px;max-width:640px;margin:14px auto 0}

/* DROP */
.drop{margin:34px auto 0;max-width:760px;border:2px dashed var(--line);border-radius:var(--r);
  background:var(--card);padding:46px 20px;transition:.2s;cursor:pointer}
.drop:hover,.drop.over{border-color:var(--acc);background:var(--card2);
  box-shadow:0 0 0 4px rgba(79,140,255,.12)}
.drop-ico{font-size:46px}
.drop-title{font-size:19px;font-weight:600;margin-top:12px}
.link{color:var(--acc)}
.drop-sub{color:var(--muted);font-size:14px;margin-top:6px}

/* BENCH */
.bench{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;margin-top:26px;text-align:left}
@media(max-width:820px){.bench{grid-template-columns:1fr}}
.thumbs{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:10px}
.thumb{position:relative;border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:var(--card2);aspect-ratio:1}
.thumb img{width:100%;height:100%;object-fit:cover;display:block}
.thumb .sz{position:absolute;bottom:0;left:0;right:0;font-size:11px;padding:3px 6px;
  background:rgba(0,0,0,.55);color:#fff;display:flex;justify-content:space-between}
.hint{color:var(--muted);font-size:13px;margin-top:10px}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.panel-row{display:flex;flex-direction:column;gap:8px;margin-bottom:16px}
.panel-row label{font-size:14px;color:var(--muted);display:flex;align-items:center;gap:8px}
.panel-row select,.panel-row input[type=text]{
  background:var(--bg2);border:1px solid var(--line);color:var(--txt);
  border-radius:10px;padding:10px 12px;font-size:14px;width:100%}
.panel-row input[type=range]{accent-color:var(--acc);width:100%}
.qval{color:var(--txt);font-weight:700}
.pro-row{padding-top:14px;border-top:1px dashed var(--line)}
.pro-tag{background:linear-gradient(135deg,var(--acc),var(--acc2));color:#fff;
  font-size:11px;padding:2px 8px;border-radius:20px;font-weight:700}

.result{margin-top:16px;background:var(--bg2);border:1px solid var(--line);
  border-radius:12px;padding:16px}
.result-line{font-size:15px;margin-bottom:12px;display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.save{background:rgba(46,204,113,.15);color:var(--good);padding:3px 10px;border-radius:20px;font-weight:700;font-size:13px}

/* FEATURES */
.features{padding:50px 0}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:820px){.grid-3{grid-template-columns:1fr}}
.feat{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.f-ico{font-size:30px}
.feat h3{margin:12px 0 6px;font-size:18px}
.feat p{color:var(--muted);font-size:14px}

/* PRICING */
.pricing{padding:50px 0;text-align:center}
.pricing h2,.faq h2{font-size:30px;margin-bottom:6px}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:720px;margin:30px auto 0}
@media(max-width:640px){.plans{grid-template-columns:1fr}}
.plan{background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:28px 24px;position:relative;text-align:left}
.plan.pro{border-color:var(--acc);box-shadow:0 0 0 3px rgba(79,140,255,.15)}
.badge{position:absolute;top:14px;right:14px;background:linear-gradient(135deg,var(--acc),var(--acc2));
  color:#fff;font-size:12px;font-weight:700;padding:4px 12px;border-radius:20px}
.plan h3{font-size:18px;color:var(--muted)}
.price{font-size:40px;font-weight:800;margin:10px 0 18px}
.price small{font-size:15px;color:var(--muted);font-weight:500}
.plan ul{list-style:none;margin-bottom:22px}
.plan li{padding:7px 0;font-size:15px;border-bottom:1px solid rgba(255,255,255,.05)}
.plan li.off{color:#5b6780}
.plan .btn{width:100%}

/* FAQ */
.faq{padding:50px 0}
.narrow{max-width:720px}
.qa{background:var(--card);border:1px solid var(--line);border-radius:12px;
  padding:18px 20px;margin-top:14px}
.qa b{font-size:16px}
.qa p{color:var(--muted);margin-top:6px;font-size:15px}

/* FOOTER */
.footer{border-top:1px solid var(--line);padding:26px 0;margin-top:20px;color:var(--muted);font-size:14px}
.footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.foot-links{display:flex;gap:18px}

/* MODAL */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);
  display:grid;place-items:center;z-index:50;padding:20px}
.modal-card{background:var(--card);border:1px solid var(--line);border-radius:18px;
  padding:28px;max-width:420px;width:100%;position:relative}
.modal-x{position:absolute;top:14px;right:16px;background:none;border:none;color:var(--muted);
  font-size:26px;cursor:pointer;line-height:1}
.modal-card h3{font-size:20px;margin-bottom:6px}
.modal-card .sub{margin:0 0 18px;font-size:14px}
#payBody .pay-opt{display:flex;align-items:center;justify-content:space-between;
  background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:14px 16px;margin-bottom:12px;cursor:pointer}
#payBody .pay-opt:hover{border-color:var(--acc)}
.pay-opt .p-ico{font-size:22px;margin-right:10px}
.pay-opt .p-name{font-weight:600}
.pay-opt .p-desc{font-size:12px;color:var(--muted)}
.fine{color:var(--muted);font-size:12px;margin-top:12px}

/* TOAST */
.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);
  background:var(--card2);border:1px solid var(--acc);color:var(--txt);
  padding:12px 20px;border-radius:12px;font-size:14px;z-index:60;
  box-shadow:0 10px 30px rgba(0,0,0,.4)}